chore(release): v0.3.0

BREAKING CHANGE: `config.publicDir`'s default changed from `<srcDir>/public` to `rootDir/<public>` to align with other frameworks and standards

.github/workflows/release.yml

@@ -7,7 +7,7 @@ jobs:
     uses: './.github/workflows/validate.yml'
 
   publish:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     needs:
       - validate
     steps:
@@ -19,7 +19,7 @@ jobs:
       - name: Setup PNPM
         uses: pnpm/action-setup@v2
         with:
-          version: 7
+          version: 8
 
       - name: Setup NodeJS
         uses: actions/setup-node@v3
@@ -31,7 +31,7 @@ jobs:
         run: |
           pnpm install --ignore-scripts
           pnpm build
-          pnpm install
+          pnpm install --ignore-scripts
 
       - name: Bump and Tag
         run: |
@@ -47,4 +47,4 @@ jobs:
           pnpm publish
 
       - name: GitHub Release
-        run: pnpx changelogen@latest gh release
+        run: pnpx changelogen@latest gh release --token ${{ secrets.GITHUB_TOKEN }}

.github/workflows/validate.yml

@@ -7,8 +7,13 @@ on:
       - main
 
 jobs:
-  validate:
-    runs-on: ubuntu-20.04
+  wxt:
+    name: WXT
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -16,7 +21,7 @@ jobs:
       - name: Setup PNPM
         uses: pnpm/action-setup@v2
         with:
-          version: 7
+          version: 8
 
       - name: Setup NodeJS
         uses: actions/setup-node@v3
@@ -28,7 +33,8 @@ jobs:
         run: |
           pnpm install --ignore-scripts
           pnpm build
-          pnpm install
+          pnpm install --ignore-scripts
+          cd demo && pnpm wxt prepare
 
       - name: Formatting
         run: pnpm format:check
@@ -42,7 +48,55 @@ jobs:
           pnpm build:all:chrome-mv3
           pnpm build:all:firefox-mv2
           pnpm build:all:firefox-mv3
+          pnpm compile
+          pnpm zip
         working-directory: demo
 
       - name: Tests
-        run: pnpm test:coverage
+        run: pnpm test:coverage --reporter=default --reporter=hanging-process
+
+  project-templates:
+    name: Project Templates
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Setup PNPM
+        uses: pnpm/action-setup@v2
+        with:
+          version: 8
+
+      - name: Setup NodeJS
+        uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          cache: 'pnpm'
+
+      - name: Validate Vanilla
+        working-directory: templates/vanilla
+        run: |
+          npm i
+          npm run build
+          npm run compile
+
+      - name: Validate Vue
+        working-directory: templates/vue
+        run: |
+          npm i
+          npm run build
+          npm run compile
+
+      - name: Validate React
+        working-directory: templates/react
+        run: |
+          npm i
+          npm run build
+          npm run compile
+
+      - name: Validate Svelte
+        working-directory: templates/svelte
+        run: |
+          npm i
+          npm run build
+          npm run check

.gitignore

@@ -15,3 +15,6 @@ node_modules
 TODOs.md
 web-ext.config.js
 web-ext.config.ts
+templates/*/pnpm-lock.yaml
+templates/*/yarn.lock
+templates/*/package-lock.json

.npmrc

@@ -1,2 +1 @@
 ignore-workspace-root-check=true
-use-node-version=18.16.0

.prettierignore

@@ -1,3 +1,7 @@
 .output
 coverage
 dist
+e2e/project
+.wxt
+docs/.vitepress/cache
+pnpm-lock.yaml

CHANGELOG.md

@@ -1,5 +1,322 @@
 # Changelog
 
+## v0.3.0
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.2.5...v0.3.0)
+
+### 🚀 Enhancements
+
+- ⚠️  Add type safety to `browser.runtime.getURL` ([58a84ec](https://github.com/aklinker1/wxt/commit/58a84ec))
+- ⚠️  Change default `publicDir` to `<rootDir>/public` ([19c0948](https://github.com/aklinker1/wxt/commit/19c0948))
+- Windows support ([#50](https://github.com/aklinker1/wxt/pull/50))
+
+### 🩹 Fixes
+
+- Add `WebWorker` lib to generated tsconfig ([2c70246](https://github.com/aklinker1/wxt/commit/2c70246))
+
+### 📖 Documentation
+
+- Update entrypoint directory links ([0aebb67](https://github.com/aklinker1/wxt/commit/0aebb67))
+
+### 🌊 Types
+
+- Allow any string for the __BROWSER__ global ([6092235](https://github.com/aklinker1/wxt/commit/6092235))
+
+### 🤖 CI
+
+- Improve checks against `demo/` extension ([9cc464f](https://github.com/aklinker1/wxt/commit/9cc464f))
+
+#### ⚠️  Breaking Changes
+
+- ⚠️  Add type safety to `browser.runtime.getURL` ([58a84ec](https://github.com/aklinker1/wxt/commit/58a84ec))
+- ⚠️  Change default `publicDir` to `<rootDir>/public` ([19c0948](https://github.com/aklinker1/wxt/commit/19c0948))
+
+### ❤️  Contributors
+
+- Aaron 
+- Aaron Klinker
+
+## v0.2.5
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.2.4...v0.2.5)
+
+### 🚀 Enhancements
+
+- Auto-import from subdirectories ([547fee0](https://github.com/aklinker1/wxt/commit/547fee0))
+- Include background script in dev mode if user doesn't define one ([ca20a21](https://github.com/aklinker1/wxt/commit/ca20a21))
+
+### 🩹 Fixes
+
+- Don't crash when generating types in dev mode ([d8c1903](https://github.com/aklinker1/wxt/commit/d8c1903))
+- Properly load entrypoints that reference `import.meta` ([54b18cc](https://github.com/aklinker1/wxt/commit/54b18cc))
+
+### 🏡 Chore
+
+- Update templates to wxt@0.2 ([9d00eb2](https://github.com/aklinker1/wxt/commit/9d00eb2))
+
+### 🤖 CI
+
+- Validate project templates ([9ac756f](https://github.com/aklinker1/wxt/commit/9ac756f))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.2.4
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.2.3...v0.2.4)
+
+### 🚀 Enhancements
+
+- Add `wxt zip` command ([#47](https://github.com/aklinker1/wxt/pull/47))
+
+### ❤️ Contributors
+
+- Aaron
+
+## v0.2.3
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.2.2...v0.2.3)
+
+### 🩹 Fixes
+
+- Correctly lookup open port ([#45](https://github.com/aklinker1/wxt/pull/45))
+- Read boolean maniest options from meta tags correctly ([495c5c8](https://github.com/aklinker1/wxt/commit/495c5c8))
+- Some fields cannot be overridden from `config.manifest` ([#46](https://github.com/aklinker1/wxt/pull/46))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.2.2
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.2.1...v0.2.2)
+
+### 🩹 Fixes
+
+- Register content scripts correctly in dev mode ([2fb5a54](https://github.com/aklinker1/wxt/commit/2fb5a54))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.2.1
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.2.0...v0.2.1)
+
+### 🚀 Enhancements
+
+- Support all content script options ([6f5bf89](https://github.com/aklinker1/wxt/commit/6f5bf89))
+
+### 🩹 Fixes
+
+- Remove HMR log ([90fa6bf](https://github.com/aklinker1/wxt/commit/90fa6bf))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.2.0
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.1.6...v0.2.0)
+
+### 🚀 Enhancements
+
+- ⚠️ Rename `defineBackgroundScript` to `defineBackground` ([5b48ae9](https://github.com/aklinker1/wxt/commit/5b48ae9))
+- Recongize unnamed content scripts (`content.ts` and `content/index.ts`) ([3db5cec](https://github.com/aklinker1/wxt/commit/3db5cec))
+
+### 📖 Documentation
+
+- Update templates ([f28a29e](https://github.com/aklinker1/wxt/commit/f28a29e))
+- Add docs for each type of entrypoint ([77cbfc1](https://github.com/aklinker1/wxt/commit/77cbfc1))
+- Add inline JSDoc for public types ([375a2a6](https://github.com/aklinker1/wxt/commit/375a2a6))
+
+### 🏡 Chore
+
+- Run `wxt prepare` on `postinstall` ([c1ea9ba](https://github.com/aklinker1/wxt/commit/c1ea9ba))
+- Don't format lockfile ([5c7e041](https://github.com/aklinker1/wxt/commit/5c7e041))
+
+#### ⚠️ Breaking Changes
+
+- ⚠️ Rename `defineBackgroundScript` to `defineBackground` ([5b48ae9](https://github.com/aklinker1/wxt/commit/5b48ae9))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.1.6
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.1.5...v0.1.6)
+
+### 🩹 Fixes
+
+- Resolve tsconfig paths in vite ([ea92a27](https://github.com/aklinker1/wxt/commit/ea92a27))
+- Add logs when a hot reload happens ([977246f](https://github.com/aklinker1/wxt/commit/977246f))
+
+### 🏡 Chore
+
+- React and Vue starter templates ([#33](https://github.com/aklinker1/wxt/pull/33))
+- Svelte template ([#34](https://github.com/aklinker1/wxt/pull/34))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+- Aaron
+
+## v0.1.5
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.1.4...v0.1.5)
+
+### 🩹 Fixes
+
+- Include `vite/client` types ([371be99](https://github.com/aklinker1/wxt/commit/371be99))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.1.4
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.1.3...v0.1.4)
+
+### 🩹 Fixes
+
+- Fix regression where manifest was not listed first in build summary ([fa2b656](https://github.com/aklinker1/wxt/commit/fa2b656))
+- Fix config hook implementations for vite plugins ([49965e7](https://github.com/aklinker1/wxt/commit/49965e7))
+
+### 📖 Documentation
+
+- Update CLI screenshot ([0a26673](https://github.com/aklinker1/wxt/commit/0a26673))
+
+### 🏡 Chore
+
+- Update prettier ignore ([68611ae](https://github.com/aklinker1/wxt/commit/68611ae))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.1.3
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.1.2...v0.1.3)
+
+### 🚀 Enhancements
+
+- Add tsconfig path aliases ([#32](https://github.com/aklinker1/wxt/pull/32))
+
+### 🩹 Fixes
+
+- Merge `manifest` option from both inline and user config ([05ca998](https://github.com/aklinker1/wxt/commit/05ca998))
+- Cleanup build summary with sourcemaps ([ac0b28e](https://github.com/aklinker1/wxt/commit/ac0b28e))
+
+### 📖 Documentation
+
+- Create documentation site ([#31](https://github.com/aklinker1/wxt/pull/31))
+
+### 🏡 Chore
+
+- Upgrade to pnpm 8 ([0ce7c9d](https://github.com/aklinker1/wxt/commit/0ce7c9d))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.1.2
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.1.1...v0.1.2)
+
+### 🚀 Enhancements
+
+- Accept a function for `config.manifest` ([ee49837](https://github.com/aklinker1/wxt/commit/ee49837))
+
+### 🩹 Fixes
+
+- Add missing types for `webextension-polyfill` and the `manifest` option ([636aa48](https://github.com/aklinker1/wxt/commit/636aa48))
+- Only add imports to JS files ([b29c3c6](https://github.com/aklinker1/wxt/commit/b29c3c6))
+- Generate valid type for `EntrypointPath` when there are no entrypoints ([6e7184d](https://github.com/aklinker1/wxt/commit/6e7184d))
+
+### 🌊 Types
+
+- Change `config.vite` to `UserConfig` ([ef6001e](https://github.com/aklinker1/wxt/commit/ef6001e))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.1.1
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.1.0...v0.1.1)
+
+### 🩹 Fixes
+
+- Allow dashes in entrypoint names ([2e51e73](https://github.com/aklinker1/wxt/commit/2e51e73))
+- Unable to read entrypoint options ([#28](https://github.com/aklinker1/wxt/pull/28))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.1.0
+
+Initial release of WXT. Full support for production builds and initial toolkit for development:
+
+- HMR support when HTML page dependencies change
+- Reload extension when background changes
+- Reload HTML pages when saving them directly
+- Re-register and reload tabs when content scripts change
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.0.2...v0.1.0)
+
+### 🚀 Enhancements
+
+- Content scripts reloading ([#25](https://github.com/aklinker1/wxt/pull/25))
+
+### 📖 Documentation
+
+- Update feature list ([0255028](https://github.com/aklinker1/wxt/commit/0255028))
+
+### 🤖 CI
+
+- Create github release ([b7c078f](https://github.com/aklinker1/wxt/commit/b7c078f))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
+## v0.0.2
+
+[compare changes](https://github.com/aklinker1/wxt/compare/v0.0.1...v0.0.2)
+
+### 🚀 Enhancements
+
+- Reload extension when source code is changed ([#17](https://github.com/aklinker1/wxt/pull/17))
+- Setup background script web socket/reload ([#22](https://github.com/aklinker1/wxt/pull/22))
+- Reload HTML files individually ([#23](https://github.com/aklinker1/wxt/pull/23))
+
+### 🩹 Fixes
+
+- Output chunks to a chunks directory ([2dd7a99](https://github.com/aklinker1/wxt/commit/2dd7a99))
+- Remove hash from content script css outputs ([#20](https://github.com/aklinker1/wxt/pull/20))
+- Overwrite files with the same name when renaming entrypoints in dev mode ([37986bf](https://github.com/aklinker1/wxt/commit/37986bf))
+- Separate template builds to prevent sharing chunks ([7f3a1e8](https://github.com/aklinker1/wxt/commit/7f3a1e8))
+- Show Vite warnings and errors ([c51f0e0](https://github.com/aklinker1/wxt/commit/c51f0e0))
+
+### 📖 Documentation
+
+- Add milestone progress badge to README ([684197d](https://github.com/aklinker1/wxt/commit/684197d))
+- Fix milestone link in README ([e14f81d](https://github.com/aklinker1/wxt/commit/e14f81d))
+
+### 🏡 Chore
+
+- Refactor build output type ([#19](https://github.com/aklinker1/wxt/pull/19))
+- Refactor build outputs to support transpiled templates ([a78aada](https://github.com/aklinker1/wxt/commit/a78aada))
+- Rename `templates` to `virtual-modules` ([#24](https://github.com/aklinker1/wxt/pull/24))
+- Update cli screenshot ([54eb118](https://github.com/aklinker1/wxt/commit/54eb118))
+
+### ❤️ Contributors
+
+- Aaron Klinker
+
 ## v0.0.1
 
 [compare changes](https://github.com/aklinker1/wxt/compare/v0.0.0...v0.0.1)
@@ -73,4 +390,3 @@
 ### ❤️ Contributors
 
 - Aaron Klinker
-- Aaron

README.md

@@ -2,35 +2,28 @@
 
 <p align="center"><i>Next gen framework for developing web extensions.<br/>Powered by <a href="https://vitejs.dev/" target="_blank">Vite</a>. Inspired by <a href="https://nuxt.com/" target="_blank">Nuxt</a>.</i></p>
 
-![Example CLI Output](./.github/assets/cli-output.png)
-
-> **Warning**
->
-> WXT is not ready for use yet. Production builds work, but dev mode is incomplete.
->
-> See the [Initial Release Candidate](https://github.com/aklinker1/wxt/milestone/1) milestone for more details.
+![Example CLI Output](./docs/assets/cli-output.png)
 
 ## Features
 
 - 🌐 Supports all browsers
 - ✅ Supports both MV2 and MV3
-- 📂 Directory based entrypoints
+- ⚡ Dev mode with HMR & auto-reload
+- 📂 File based entrypoints
 - 🚔 TypeScript
 - 🦾 Auto-imports
-- ⚡ Dev mode with HMR
 - ⬇️ Download and bundle remote URL imports
 - 🎨 Frontend framework agnostic: works with Vue, React, Svelte, etc
 
 ### Todo
 
-- 🤖 Automated publishing
 - 🖍️ Quickly bootstrap a new project
 - 📏 Bundle analysis
-- ⚡ Dev mode with HMR and **_auto-reload_**
+- 🤖 Automated publishing
 
 ## Get Started
 
-Checkout the [installation guide](https://wxtjs.dev/get-started) to get started with WXT.
+Checkout the [installation guide](https://wxt.dev/get-started/installation.html) to get started with WXT.
 
 ## Contributors
 

demo/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "Demo",
+  "name": "WXT Demo",
   "version": "1.0.0",
   "description": "Demo extension for WXT",
   "type": "module",
@@ -11,7 +11,9 @@
     "build:all:chrome-mv2": "wxt build --mv2",
     "build:all:firefox-mv3": "wxt build -b firefox --mv3",
     "build:all:firefox-mv2": "wxt build -b firefox",
-    "prepare": "pnpm -w build && wxt prepare"
+    "zip": "pnpm -w build && wxt zip",
+    "compile": "pnpm -w build && tsc --noEmit",
+    "postinstall": "pnpm -w build && wxt prepare"
   },
   "dependencies": {
     "webextension-polyfill": "^0.10.0"

demo/src/entrypoints/background.ts

@@ -1,4 +1,4 @@
-export default defineBackgroundScript(() => {
+export default defineBackground(() => {
   console.log(browser.runtime.id);
   logId();
   console.log({
@@ -7,4 +7,9 @@ export default defineBackgroundScript(() => {
     firefox: __IS_FIREFOX__,
     manifestVersion: __MANIFEST_VERSION__,
   });
+
+  // @ts-expect-error: should only accept entrypoints or public assets
+  browser.runtime.getURL('/');
+  browser.runtime.getURL('/background.js');
+  browser.runtime.getURL('/icon/128.png');
 });

demo/src/entrypoints/overlay.content/index.ts

@@ -4,7 +4,7 @@ export default defineContentScript({
   matches: ['*://*/*'],
   async main() {
     console.log(browser.runtime.id);
-
+    logId();
     mountContentScriptUi();
   },
 });

docs/.vitepress/components/Icon.vue

@@ -0,0 +1,24 @@
+<script lang="ts" setup>
+defineProps<{
+  name: string;
+  icon?: string;
+}>();
+</script>
+
+<template>
+  <img
+    :src="`https://raw.githubusercontent.com/PKief/vscode-material-icon-theme/main/icons/${
+      name?.toLowerCase() ?? icon
+    }.svg`"
+    :alt="`${name} Logo`"
+  />
+</template>
+
+<style scoped>
+img {
+  display: inline;
+  transform: translateY(5px);
+  margin-right: 8px;
+  width: 20px;
+}
+</style>

docs/.vitepress/config.ts

@@ -0,0 +1,72 @@
+import { defineConfig } from 'vitepress';
+
+// https://vitepress.dev/reference/site-config
+export default defineConfig({
+  title: 'WXT',
+  description: 'Next gen framework for developing web extensions',
+  lastUpdated: true,
+
+  themeConfig: {
+    // https://vitepress.dev/reference/default-theme-config
+    // logo: '/logo.svg',
+    editLink: {
+      pattern: 'https://github.com/aklinker1/wxt/edit/main/docs/:path',
+    },
+    search: {
+      provider: 'local',
+    },
+
+    nav: [
+      { text: 'Get Started', link: '/get-started/installation.md' },
+      { text: 'Guide', link: '/guide/auto-imports.md' },
+      { text: 'Config', link: '/config.md' },
+      { text: 'API', link: '/api.md' },
+    ],
+
+    sidebar: {
+      '/get-started/': [
+        {
+          text: 'Get Started',
+          items: [
+            { text: 'Introduction', link: '/get-started/introduction.md' },
+            { text: 'Installation', link: '/get-started/installation.md' },
+            { text: 'Configuration', link: '/get-started/configuration.md' },
+            { text: 'Entrypoints', link: '/get-started/entrypoints.md' },
+            { text: 'Assets', link: '/get-started/assets.md' },
+            { text: 'Build Targets', link: '/get-started/build-targets.md' },
+            { text: 'Publishing', link: '/get-started/publishing.md' },
+            { text: 'Testing', link: '/get-started/testing.md' },
+          ],
+        },
+      ],
+      '/guide/': [
+        {
+          text: 'Guide',
+          items: [
+            { text: 'Auto-imports', link: '/guide/auto-imports.md' },
+            { text: 'Manifest.json', link: '/guide/manifest.md' },
+            { text: 'Extension APIs', link: '/guide/extension-apis.md' },
+          ],
+        },
+        {
+          text: 'Entrypoints',
+          items: [
+            { text: 'Background', link: '/guide/background.md' },
+            { text: 'Bookmarks', link: '/guide/bookmarks.md' },
+            { text: 'Content Scripts', link: '/guide/content-scripts.md' },
+            { text: 'Devtools', link: '/guide/devtools.md' },
+            { text: 'History', link: '/guide/history.md' },
+            { text: 'Newtab', link: '/guide/newtab.md' },
+            { text: 'Options', link: '/guide/options.md' },
+            { text: 'Popup', link: '/guide/popup.md' },
+            { text: 'Sandbox', link: '/guide/sandbox.md' },
+            { text: 'Unlisted Pages', link: '/guide/unlisted-pages.md' },
+            { text: 'Unlisted Scripts', link: '/guide/unlisted-scripts.md' },
+          ],
+        },
+      ],
+    },
+
+    socialLinks: [{ icon: 'github', link: 'https://github.com/aklinker1/wxt' }],
+  },
+});

docs/.vitepress/theme/index.ts

@@ -0,0 +1,9 @@
+import DefaultTheme from 'vitepress/theme';
+import Icon from '../components/Icon.vue';
+
+export default {
+  extends: DefaultTheme,
+  enhanceApp(ctx) {
+    ctx.app.component('Icon', Icon);
+  },
+};

docs/api.md

@@ -0,0 +1,5 @@
+# API Reference
+
+:::warning 🚧 Under construction
+This documentation does not exist yet.
+:::

docs/config.md

@@ -0,0 +1,5 @@
+# Config
+
+:::warning 🚧 Under construction
+This documentation does not exist yet.
+:::

docs/get-started/assets.md

@@ -0,0 +1,85 @@
+# Assets
+
+WXT has two directories for storing assets like CSS, images, or fonts.
+
+- `<srcDir>/public`: Store files that will be copied into the output directory as-is
+- `<srcDir>/assets`: Store files that will be processed by Vite during the build process
+
+## `/public` Directory
+
+Place static files like the extension icon or `_locales/` directory here. These files will be copied over to the output directory without being transformed by Vite.
+
+```
+<srcDir>
+└─ public/
+   ├─ icon-16.png
+   ├─ icon-32.png
+   ├─ icon-48.png
+   ├─ icon-96.png
+   └─ icon-128.png
+```
+
+### Example
+
+You can reference these files by using absolute paths in HTML files or `browser.runtime.getURL` in content scripts.
+
+:::code-group
+
+```html [popup.html]
+<img src="/icon-128.png" />
+```
+
+```ts [content.ts]
+defineContentScript({
+  main() {
+    const image = document.createElement('img');
+    image.src = browser.runtime.getURL('/icon-128.png');
+    document.body.append(image);
+  },
+});
+```
+
+:::
+
+## `/assets` Directory
+
+Files in the assets directory will be processed by Vite. They are imported in your source code, and will be transformed or renamed in the output directory.
+
+```
+<srcDir>
+└─ assets/
+   ├─ style.css
+   └─ illustration.svg
+```
+
+### Example
+
+:::code-group
+
+```html [popup.html]
+<html>
+  <head>
+    <link rel="stylesheet" href="~/assets/style.css" />
+    <!-- ... -->
+  </head>
+  <body>
+    <img src="~/illustration.svg" />
+    <!-- ... -->
+  </body>
+</html>
+```
+
+```ts [content.ts]
+import '~/assets/style.css';
+import illustration from '~/assets/style.svg';
+
+defineContentScript({
+  main() {
+    const image = document.createElement('img');
+    image.src = illustration;
+    document.body.append(image);
+  },
+});
+```
+
+:::

docs/get-started/build-targets.md

@@ -0,0 +1,46 @@
+# Build Targets
+
+You can build an extension for any combination of browser and manifest verison. Different browsers and manifest versions support different APIs and entrypoints, so be sure to check that your extension functions as expected for each target.
+
+Separate build targets are written to their own output directories:
+
+```
+<root>
+└─ .output
+   ├─ chrome-mv3
+   ├─ firefox-mv2
+   ├─ edge-mv3
+   └─ ...
+```
+
+## Target Browser
+
+To build for a specific browser, pass the `-b --browser` flag from the CLI:
+
+```
+
+wxt --browser firefox
+wxt build --browser firefox
+
+```
+
+By default, it will build for `chrome`. When excluding the [`--mv2` or `--mv3` flags](#target-manifest-version), it will default to the commonly accepted manifest version used with that browser.
+
+| Browser          | Default Manifest Version |
+| ---------------- | :----------------------: |
+| `chrome`         |            3             |
+| `firefox`        |            2             |
+| `safari`         |            2             |
+| `edge`           |            3             |
+| Any other string |            3             |
+
+## Target Manifest Version
+
+To build for a specific manifest version, pass either the `--mv2` flag or `--mv3` flag from the CLI.
+
+```sh
+wxt --mv2
+wxt build --mv2
+```
+
+When the `-b --browser` flag is not passed, it defaults to `chrome`. So here, we're targetting MV2 for Chrome.

docs/get-started/configuration.md

@@ -0,0 +1,92 @@
+# Configuration
+
+WXT's behavior can be configured via the `wxt.config.ts` file. In this file, you can add Vite plugins, change the directory strucutre of your project, and provide permissions or other fields to the `<outdir>/manifest.json`.
+
+However, since WXT is an opinionated framework, some things cannot be configured.
+
+## Config File
+
+To configure WXT, create a `wxt.config.ts` file in your project root. It should have the following contents:
+
+```ts
+import { defineConfig } from 'wxt';
+
+export default defineConfig({
+  // My WXT config
+});
+```
+
+:::info
+See the [API reference](/api.md) for a full list of options.
+:::
+
+## Directory Config
+
+WXT allows you to edit several directories to your liking:
+
+- `root` (default: `process.cwd()`) - Root of the WXT project
+- `srcDir` (default: `<root>`) - Location of all your source code
+- `entrypointsDir` (default: `<srcDir>/entrypoints`) - Folder containing all the entrypoints.
+- `publicDir` (default: `<srcDir>/public`) - Folder containing [public assets](/get-started/assets.md)
+
+### Example
+
+If you want a `src/` directory to contain all your source code, and you want to rename `entrypoints/` to `entries/`, your config would look like this:
+
+```ts
+import { defineConfig } from 'wxt';
+
+export default defineConfig({
+  srcDir: 'src',
+  entrypointsDir: 'entries',
+});
+```
+
+## Vite Config
+
+[Vite](https://vitejs.dev/) is the bundler used to build each entrypoint of your extension. Vite can be configured via the `vite` option.
+
+See [Vite's documentation](https://vitejs.dev/config/) for configuring the bundler.
+
+## Frontend Frameworks
+
+Adding a framework like Vue, React, or Svelte is easy!
+
+In the `wxt.config.ts` file, install and add the framework's Vite plugin to the config.
+
+:::code-group
+
+```ts [Vue]
+import { defineConfig } from 'wxt';
+import vue from '@vitejs/plugin-vue';
+
+export default defineConfig({
+  vite: {
+    plugins: [vue()],
+  },
+});
+```
+
+```ts [React]
+import { defineConfig } from 'wxt';
+import react from '@vitejs/plugin-react';
+
+export default defineConfig({
+  vite: {
+    plugins: [react()],
+  },
+});
+```
+
+```ts [Svelte]
+import { defineConfig } from 'wxt';
+import { svelte } from '@sveltejs/vite-plugin-svelte';
+
+export default defineConfig({
+  vite: {
+    plugins: [svelte()],
+  },
+});
+```
+
+:::

docs/get-started/entrypoints.md

@@ -0,0 +1,89 @@
+# Defining Entrypoints
+
+An entrypoints is any HTML, JS, or CSS file that needs to be bundled and included with the extension.
+
+They may or may not be listed in the extension's `manifest.json`.
+
+## `/entrypoints` Directory
+
+In WXT, entrypoints are defined by adding a file to the `entrypoints/` directory.
+
+For example, a project that looks like this:
+
+```
+<root>
+├─ entrypoints/
+│  ├─ background.ts
+│  ├─ content.ts
+│  ├─ injected.ts
+│  └─ popup.html
+└─ wxt.config.ts
+```
+
+would result in the following `manifest.json`:
+
+```json
+{
+  // ...
+  "manifest_version": 3,
+  "action": {
+    // ...
+    "default_popup": "popup.html"
+  },
+  "background": {
+    // ...
+    "service_worker": "background.js"
+  },
+  "content_scripts": [
+    {
+      // ...
+      "js": ["content-scripts/content.js"]
+    }
+  ]
+}
+```
+
+If a file uses a [special name recognized by WXT](/get-started/entrypoints.md), it will be added to the manifest. In this case:
+
+- `popup.html` &rarr; `action.default_popup`
+- `content.ts` &rarr; `content_scripts.0.js.0`
+- `background.ts` &rarr; `background.service_worker`
+
+But not all entrypoints are added to the `manifest.json`. If they have a name that is not recognized by WXT, they are still built and included in the extension, but they are considered "unlisted" and are not apart of the manifest.
+
+In this case, `injected.ts` gets bundled to `<outdir>/injected.js` and is accessible via `browser.runtime.getURL("/injected.js")`.
+
+:::info
+See [`/entrypoints` folder](/guide/background.md) documentation for a full list of recognized entrypoint filenames.
+:::
+
+## Entrypoint Options
+
+Some entrypoints, like content scripts, actions, or the background, can recieve additional options.
+
+In HTML files, options are listed as `meta` tags:
+
+```html
+<html>
+  <head>
+    <!-- Defining the popup's "default_icon" field -->
+    <meta name="manifest.default_icon" content="{ '16': '/icon/16.png' }" />
+  </head>
+</html>
+```
+
+In TS files, options are apart of the file's default export:
+
+```ts
+export default defineContentScript({
+  matches: ['*://*.google.com/*'],
+  runAt: 'document_start',
+  main() {
+    // ...
+  },
+});
+```
+
+:::info
+For a full list of entrypoints and each of their options, see the [`/entrypoints` folder](/guide/background.md) documentation.
+:::

docs/get-started/installation.md

@@ -0,0 +1,130 @@
+# Installation
+
+Bootstrap a new project or start from scratch.
+
+## Bootstrap Project
+
+:::warning 🚧 The `wxt init` command is not implemented yet.
+
+See [From Scratch](#from-scratch) or reference one of the templates below.
+
+:::
+
+:::code-group
+
+```sh [pnpm]
+pnpx wxt@latest init
+```
+
+```sh [npm]
+npx wxt@latest init
+```
+
+:::
+
+There are several starting templates available.
+
+| TypeScript                                                                                           |
+| ---------------------------------------------------------------------------------------------------- |
+| <Icon name="TypeScript" /> [`vanilla`](https://github.com/aklinker1/wxt/tree/main/templates/vanilla) |
+| <Icon name="Vue" /> [`vue`](https://github.com/aklinker1/wxt/tree/main/templates/vue)                |
+| <Icon name="React" /> [`react`](https://github.com/aklinker1/wxt/tree/main/templates/react)          |
+| <Icon name="Svelte" /> [`svelte`](https://github.com/aklinker1/wxt/tree/main/templates/svelte)       |
+
+> All templates are in TypeScript. WXT does not support JS at this time.
+
+## From Scratch
+
+Create a new NPM project:
+
+:::code-group
+
+```sh [pnpm]
+mkdir project-name
+cd project-name
+pnpm init
+echo 'shamefully-hoist=true' >> .npmrc
+```
+
+```sh [npm]
+mkdir project-name
+cd project-name
+npm init
+```
+
+```sh [yarn]
+mkdir project-name
+cd project-name
+yarn init
+```
+
+:::
+
+Then install `wxt`:
+
+:::code-group
+
+```sh [pnpm]
+pnpm add wxt
+```
+
+```sh [npm]
+npm i --save wxt
+```
+
+```sh [yarn]
+yarn add wxt
+```
+
+:::
+
+Add your first entrypoint:
+
+```ts
+// entrypoints/background.ts
+export default defineBackground(() => {
+  console.log(`Hello from ${browser.runtime.id}!`);
+});
+```
+
+Finally, add scripts to your `package.json`:
+
+```json
+{
+  "scripts": {
+    "dev": "wxt", // [!code ++]
+    "dev:firefox": "wxt --browser firefox", // [!code ++]
+    "build": "wxt build", // [!code ++]
+    "build:firefox": "wxt build --browser firefox", // [!code ++]
+    "postinstall": "wxt prepare" // [!code ++]
+  }
+}
+```
+
+> You can skip `*:firefox` scripts if you don't want to support Firefox
+
+## 🚧 WSL Support
+
+**_WXT does not support [Windows Subsystem for Linux](https://learn.microsoft.com/en-us/windows/wsl/) yet_**. See [Issue #55](https://github.com/aklinker1/wxt/issues/55) to track progress.
+
+In the meantime, you can use `cmd` instead.
+
+## Development
+
+Once you've installed WXT, you can start the development server using the `dev` script.
+
+```sh
+pnpm dev
+```
+
+:::tip 🎉&ensp;Well done!
+
+The dev command will build the extension for development, open the browser, and reload the different parts of the extension when you save changes.
+:::
+
+## Next Steps
+
+You're ready to build a out your web extension!
+
+- Learn how to [add entrypoints](./entrypoints.md) like the popup, background, or content scripts
+- [Configure WXT](./configuration.md) by creating a `wxt.config.ts` file

docs/get-started/introduction.md

@@ -0,0 +1,32 @@
+# Introduction
+
+WXT is a free and open source framework for building web extensions in an conventional, intuative, and safe way **_for all browsers_**.
+
+WXT comes with full TypeScript support and auto-imports. Sounds familiar? That's right, **_WXT was based off of Nuxt_** and aims to provide the same greate DX and features.
+
+![Example build output](../assets/cli-output.png)
+
+## Conventions
+
+WXT is an optionated framework. This helps keep projects consistent and easy to pick up.
+
+- **Generated manifest**: Based on your project's file structure
+- **Entrypoint configuration**: Configure entrypoints from the same file they're declare in
+- **Type-safety is a priority**: Out-of-the-box TypeScript support with improved browser API typing
+- **Simple output file structure**: Ouptut file paths minimize the path at runtime
+
+## Development
+
+WXT's dev server supports modern features like HMR to provide a lighting fast dev mode.
+
+When changes can't be hot-reloaded, like content scripts or background scripts, they're reloaded individually to prevent reloading the entire extension and slowing down your development cycle.
+
+## Production-ready
+
+Production builds are optimized for store review, changing as few files as possible between builds.
+
+In addition, WXT fully supports Firefox's source code requirements when using a bundler. It will automatically create and upload a ZIP file of your source code.
+
+:::info
+See [Publishing](./publishing.md) for more info around production builds.
+:::

docs/get-started/publishing.md

@@ -0,0 +1,5 @@
+# Publishing
+
+:::warning 🚧 Not implemented yet!
+For now, manually zip the output directory and upload to stores by hand.
+:::

docs/get-started/testing.md

@@ -0,0 +1,5 @@
+# Testing
+
+:::warning 🚧 Testing utils are not implemented yet!
+Eventually, the plan is to have an integration with Vitest.
+:::

docs/guide/auto-imports.md

@@ -0,0 +1,66 @@
+# Auto-imports
+
+WXT uses the same tool as Nuxt for auto-imports, [`unimport`](https://github.com/unjs/unimport).
+
+:::info Testing
+To setup your test environment for auto-imports, see [Testing](/get-started/testing.md).
+:::
+
+## WXT Auto-imports
+
+Some WXT APIs can be used without importing them:
+
+- [`browser`](/config.md#browser) from `wxt/browser`, a small wrapper around `webextension-polyfill`
+- [`defineContentScript`](/config.md#defiencontentscript) from `wxt/client`
+- [`defineBackground`](/config.md#definebackgroundscript) from `wxt/client`
+
+And more. All [`wxt/client`](/config.md#wxtclient) APIs can be used without imports.
+
+## Project Auto-imports
+
+In addition WXT APIs, default and named exports from inside the following directories can be used without listing them in imports.
+
+- `<srcDir>/components/**/*`
+- `<srcDir>/composables/**/*`
+- `<srcDir>/hooks/**/*`
+- `<srcDir>/utils/**/*`
+
+## TypeScript
+
+For TypeScript to work, you need to run the `wxt prepare` command. This will ensure types are generated for auto-imports.
+
+This should be added to your `postinstall` script:
+
+```json
+// package.json
+{
+  "scripts": {
+    "postinstall": "wxt prepare" // [!code ++]
+  }
+}
+```
+
+## Customization
+
+You can override the default auto-import behavior in your `wxt.config.ts` file.
+
+See [`unimport`'s documentation](https://github.com/unjs/unimport#configurations) for a complete list of options.
+
+```ts
+import { defineConfig } from 'wxt';
+
+export default defineConfig({
+  imports: {
+    // Add auto-imports for vue fuctions like createApp, ref, computed, watch, toRaw, etc...
+    preset: ['vue'],
+  },
+});
+```
+
+To disable auto-imports, set `imports: false`
+
+```ts
+export default defineConfig({
+  imports: false,
+});
+```

docs/guide/background.md

@@ -0,0 +1,38 @@
+# Background
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/mv3/manifest/background/) • [Firefox Docs](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/background)
+
+For MV2, the background is added as a script to the background page. For MV3, the background becomes a service worker.
+
+## Filenames
+
+`entrypoints/background.ts` is the only recoginzed filename for the background script.
+
+## Definition
+
+:::warning
+The main function of the background **_CANNOT BE ASYNC_**. Event listeners must be added syncronously on background startup. If your main function returns a promise, WXT will log an error.
+:::
+
+```ts
+export default defineBackground(() => {
+  // Executed when background is loaded
+});
+```
+
+or
+
+```ts
+export default defineBackground({
+  // Set manifest options
+  persistent: undefined | true | false,
+  type: undefined | 'module',
+
+  // Executed when background is loaded
+  main() {
+    // ...
+  },
+});
+```
+
+> All manifest options default to `undefined`.

docs/guide/bookmarks.md

@@ -0,0 +1,26 @@
+# Bookmarks
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/mv3/override/) • [Firefox Docs](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/chrome_url_overrides)
+
+## Filenames
+
+- `entrypoints/bookmarks.html`
+- `entrypoints/bookmarks/index.html`
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Title</title>
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```

docs/guide/content-scripts.md

@@ -0,0 +1,62 @@
+# Content Scripts
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/mv3/content_scripts/) • [Firefox Docs](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Content_scripts)
+
+## Filenames
+
+When a filename matches the pattern below, it is added as a content script in the `manifest.json`.
+
+- `entrypoints/content.tsx?`
+- `entrypoints/<name>.content.tsx?`
+- `entrypoints/content/index.tsx?`
+- `entrypoints/<name>.content/index.tsx?`
+
+## Definition
+
+```ts
+export default defineContentScript({
+  // Set manifest options
+  matches: ['*://google.com/*', '*://duckduckgo.com/*'],
+  excludeMatches: undefined | [],
+  includeGlobs: undefined | [],
+  excludeGlobs: undefined | [],
+  allFrames: undefined | [],
+  runAt: undefined | 'document_start' | 'document_end' | 'document_idle',
+  matchAboutBlank: undefined | true | false,
+  matchOriginAsFallback: undefined | true | false,
+  world: undefined | 'ISOLATED' | 'MAIN',
+
+  main() {
+    // Executed when content script is loaded
+  },
+});
+```
+
+> All manifest options default to `undefined`.
+
+When defining multiple content scripts, content script entrypoints that have the same set of options will be merged into a single `content_script` item in the manifest.
+
+## CSS
+
+To include CSS with your content script, import the CSS file at the top of your entrypoint:
+
+```
+
+<srcDir>
+└─ entrypoints/
+   └─ overlay.content/
+      ├─ index.ts
+      └─ style.css
+```
+
+```ts
+// entrypoints/overlay.content/index.ts
+import './style.css';
+
+export default defineContentScript({
+  matches: ['*://google.com/*', '*://duckduckgo.com/*'],
+  main() {
+    // ...
+  },
+});
+```

docs/guide/devtools.md

@@ -0,0 +1,26 @@
+# Devtools
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/mv3/devtools/) • [Firefox Docs](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/devtools_page)
+
+## Filenames
+
+- `entrypoints/devtools.html`
+- `entrypoints/devtools/index.html`
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Title</title>
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```

docs/guide/extension-apis.md

@@ -0,0 +1,94 @@
+# Extension APIs
+
+WXT is built on top of [`webextension-polyfill`](https://www.npmjs.com/package/webextension-polyfill), which uses the standard `browser` global.
+
+If you're used to Chrome's `chrome` global, its a simple switch:
+
+1. Replace `chrome` with `browser`
+2. [Replace callbacks with async/await](https://developer.chrome.com/docs/extensions/mv3/promises/)
+
+And that's it! Your extension now supports Chrome, Firefox, Safari, Edge, and other Chromium browsers.
+
+## Basic Usage
+
+The `browser` variable is available globally via [auto-imports](/guide/auto-imports.md), or it can be imported manually.
+
+```ts
+import browser from 'webextension-polyfill';
+```
+
+### Example
+
+Let's save the date the extension was installed. Just like `chrome`, some APIs require the permission is added to your manifest before the API is defined. Here, we need to add the `storage` permission to your manifest.
+
+```ts
+// wxt.config.ts
+import { defineConfig } from 'wxt';
+
+export default defineConfig({
+  manifest: {
+    permissions: ['storage'],
+  },
+});
+```
+
+Then we can use `browser.storage` to save the install date to local storage.
+
+```ts
+// background.ts
+export default defineBackground(() => {
+  browser.runtime.onInstall.addEventListener(({ reason }) => {
+    if (reason === 'install') {
+      browser.storage.local.setItem({ installDate: Date.now() });
+    }
+  });
+});
+```
+
+## Messaging
+
+Follow [Chrome's message passing guide](https://developer.chrome.com/docs/extensions/mv3/messaging/) to understand how message passing works in web extensions. In Google's examples, just replace `chrome` with `browser`, and it will work in WXT.
+
+Here's a basic request/response example:
+
+```ts
+// background.ts
+export default defineBackground(() => {
+  browser.runtime.onMessage.addEventListener(
+    (message, sender, sendResponse) => {
+      console.log(message); // "ping"
+
+      // Wait 1 second and respond with "pong"
+      setTimeout(() => sendResponse('pong'), 1000);
+      return true;
+    },
+  );
+});
+```
+
+```ts
+// popup/main.ts
+const res = await browser.runtime.sendMessage('ping');
+
+console.log('res'); // "pong"
+```
+
+There are a number of message passing libraries you can use to improve the message passing experience.
+
+Here are some that are compatible with WXT (because they are based off `webextension-polyfill` as well):
+
+- [`@webext-core/messaging`](https://webext-core.aklinker1.io/guide/proxy-service/) - "A light-weight, type-safe wrapper around the `browser.runtime` messaging APIs"
+- [`@webext-core/proxy-service`](https://webext-core.aklinker1.io/guide/messaging/) - "Create TRPC-like services that can be called from anywhere but run in the background"
+- [`webext-bridge`](https://github.com/zikaari/webext-bridge) - "Messaging in Web Extensions made super easy. Out of the box."
+
+## Browser Differences
+
+Some APIs are only available on certain browsers or manifest versions. You will have to check if an API exists at runtime if it is not in the `browser` standard.
+
+```ts
+if ('session' in browser.storage) {
+  // Do something with the non-standard session storage API
+}
+```
+
+> If you're using TypeScript, knowing what is non-standard is easy! APIs that are not typed are non-standard.

docs/guide/history.md

@@ -0,0 +1,26 @@
+# History
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/mv3/override/) • [Firefox Docs](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/chrome_url_overrides)
+
+## Filenames
+
+- `entrypoints/history.html`
+- `entrypoints/history/index.html`
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Title</title>
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```

docs/guide/manifest.md

@@ -0,0 +1,114 @@
+# Manifest.json
+
+The manifest.json is generated at build-time based on files in your `entrypoints` directory and your `wxt.config.ts`.
+
+## Customization
+
+While entrypoints are generated and added to the manifest at build-time, you can customize or add to your `manifest.json` in the config file.
+
+```ts
+import { defineConfig } from 'wxt';
+
+export default defineConfig({
+  manifest: {
+    host_permissions: ['*://google.com/*'],
+    content_security_policy: {
+      // ...
+    },
+  },
+});
+```
+
+## `name`
+
+If not provided via the `manifest` config, the [manifest's `name`](https://developer.chrome.com/docs/extensions/mv3/manifest/name/) defaults to your package.json's `name` property.
+
+## `version` and `version_name`
+
+The [manifest's `version` and `version_name`](https://developer.chrome.com/docs/extensions/mv3/manifest/version/) fields are based on your package.json's `version` property.
+
+- `version_name` is the exact string listed in your package.json
+- `version` is the string cleaned up, with any invalid suffixes removed
+
+### Example
+
+```json
+// package.json
+{
+  "version": "1.3.0-alpha2"
+}
+```
+
+```json
+// .output/<dir>/manifest.json
+{
+  "version": "1.3.0",
+  "version_name": "1.3.0-alpha2"
+}
+```
+
+### `icons`
+
+The [manifest's `icons`](https://developer.chrome.com/docs/extensions/mv3/manifest/icons/) property needs to be set in the config file. The files should be added to WXT's [`public` directory](/get-started/assets#public-directory).
+
+```
+public/
+├─ icon-16.png
+├─ icon-24.png
+├─ icon-48.png
+├─ icon-96.png
+└─ icon-128.png
+```
+
+```ts
+export default defineConfig({
+  manifest: {
+    icons: {
+      16: '/icon-16.png',
+      24: '/icon-24.png',
+      48: '/icon-48.png',
+      96: '/icon-96.png',
+      128: '/icon-128.png',
+    },
+  },
+});
+```
+
+### Permissions
+
+[Permissions](https://developer.chrome.com/docs/extensions/reference/permissions/) must be listed in the manifest config.
+
+```ts
+export default defineConfig({
+  manifest: {
+    permissions: ['storage', 'tabs'],
+  },
+});
+```
+
+### Localization
+
+Similar to the icon, the [`_locales` directory](https://developer.chrome.com/docs/extensions/reference/i18n/) should be placed inside the the WXT's [`public` directory](/get-started/assets#public-directory).
+
+```
+public/
+└─ _locales/
+   ├─ en/
+   │  └─ messages.json
+   ├─ es/
+   │  └─ messages.json
+   └─ ko/
+      └─ messages.json
+```
+
+Then you'll need to explicitly override the `name` and `description` properties in your config for them to be localized.
+
+```ts
+export default defineConfig({
+  manifest: {
+    name: '__MSG_extName__',
+    description: '__MSG_extDescription__',
+    default_locale: 'en',
+  },
+});
+```

docs/guide/newtab.md

@@ -0,0 +1,26 @@
+# Newtab
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/mv3/override/) • [Firefox Docs](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/chrome_url_overrides)
+
+## Filenames
+
+- `entrypoints/newtab.html`
+- `entrypoints/newtab/index.html`
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Title</title>
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```

docs/guide/options.md

@@ -0,0 +1,31 @@
+# Options
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/mv3/options/) • [Firefox Docs](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/options_ui)
+
+## Filenames
+
+- `entrypoints/options.html`
+- `entrypoints/options/index.html`
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Options Title</title>
+    <meta name="manifest.open_in_tab" content="true|false" />
+    <meta name="manifest.chrome_style" content="true|false" />
+    <meta name="manifest.browser_style" content="true|false" />
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```
+
+> All manifest options default to `undefined` when the `meta` tag is not present.

docs/guide/popup.md

@@ -0,0 +1,37 @@
+# Popup
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/reference/action/) • [Firefox Docs](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/action)
+
+## Filenames
+
+- `entrypoints/popup.html`
+- `entrypoints/popup/index.html`
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Default Popup Title</title>
+    <meta
+      name="manifest.default_icon"
+      content="{
+        16: '/icon-16.png',
+        24: '/icon-24.png',
+        ...
+      }"
+    />
+    <meta name="manifest.type" content="page_action|browser_action" />
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```
+
+> All manifest options default to `undefined` when the `meta` tag is not present.

docs/guide/sandbox.md

@@ -0,0 +1,32 @@
+# Sandbox
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/mv3/manifest/sandbox/)
+
+:::tip Chromium Only
+Firefox does not support sandboxed pages.
+:::
+
+## Filenames
+
+- `entrypoints/sandbox.html`
+- `entrypoints/<name>.sandbox.html`
+- `entrypoints/sandbox/index.html`
+- `entrypoints/<name>.sandbox/index.html`
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Title</title>
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```

docs/guide/sidepanel.md

@@ -0,0 +1,32 @@
+# Side Panel
+
+[Chrome Docs](https://developer.chrome.com/docs/extensions/reference/sidePanel/)
+
+:::tip Chromium Only
+Firefox does not support sandboxed pages.
+:::
+
+## Filenames
+
+- `entrypoints/sidepanel.html`
+- `entrypoints/<name>.sidepanel.html`
+- `entrypoints/sidepanel/index.html`
+- `entrypoints/<name>.sidepanel/index.html`
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Title</title>
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```

docs/guide/unlisted-pages.md

@@ -0,0 +1,42 @@
+# Unlisted Pages
+
+HTML pages that are built by Vite, but are not included in the manifest.
+
+### Examples
+
+- Onboarding
+- Dashboard
+- FAQ
+- Help
+- Changelog
+
+## Filenames
+
+- `entrypoints/<name>.html`
+- `entrypoints/<name>/index.html`
+
+Pages are accessible at `'/<name>.html'`:
+
+```ts
+const url = browser.runtime.getURL('/<name>.html');
+
+console.log(url); // "chrome-extension://<id>/<name>.html"
+```
+
+## Definition
+
+Plain old HTML file.
+
+```html
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Title</title>
+  </head>
+  <body>
+    <!-- ... -->
+  </body>
+</html>
+```

docs/guide/unlisted-scripts.md

@@ -0,0 +1,16 @@
+# Unlisted Scripts
+
+TypeScript files that are built, but are not included in the manifest.
+
+## Filenames
+
+- `entrypoints/<name>.tsx?`
+- `entrypoints/<name>/index.tsx?`
+
+## Definition
+
+Unlike the background and content scripts, you can define this script's logic in the main scope.
+
+```ts
+// Code goes here
+```

docs/index.md

@@ -0,0 +1,49 @@
+---
+# https://vitepress.dev/reference/default-theme-home-page
+layout: home
+titleTemplate: 'Next Generation Web Extension Framework'
+
+hero:
+  name: WXT
+  text: Next gen framework for web extensions
+  tagline: Powered by Vite, inspired by Nuxt.
+  actions:
+    - theme: brand
+      text: Get Started
+      link: /get-started/installation
+    - theme: alt
+      text: Learn More
+      link: /get-started/introduction
+
+features:
+  - icon: 🌐
+    title: Supported Browsers
+    details: Chrome, Firefox, Edge, Safari, and any Chromium based browser.
+  - icon: ✅
+    title: MV2 and MV3
+    details: Supports both manifest versions for each browser.
+  - icon: ⚡
+    title: Fast Dev Mode
+    details: HMR for UIs and fast reload for background and content scripts.
+  - icon: 📂
+    title: File Based Entrypoints
+    details: Manifest is generated based on files inside the project.
+  - icon: 🚔
+    title: TypeScript
+    details: Scale projects with full TS support.
+  - icon: 🦾
+    title: Auto-imports
+    details: Nuxt-like auto-imports to speed up development.
+  - icon: ⬇️
+    title: Bundle Remote Code
+    details: Downloads and bundles remote code imported from URLs.
+  - icon: 🎨
+    title: Frontend Framework Agnostic
+    details: Works with any front-end framework with a Vite plugin.
+  - icon: 🤖
+    title: Automated Publishing
+    details: 'TODO: Automatically zip, upload, and release extensions.'
+  - icon: 📏
+    title: Bundle Analysis
+    details: 'TODO: Tools for analyizing the final extension bundle.'
+---

e2e/tests/auto-imports.test.ts

@@ -6,7 +6,7 @@ describe('Auto Imports', () => {
     const project = new TestProject();
     project.addFile(
       'entrypoints/background.ts',
-      'export default defineBackgroundScript(() => {})',
+      'export default defineBackground(() => {})',
     );
     project.addFile(
       'entrypoints/overlay.content.ts',
@@ -21,10 +21,17 @@ describe('Auto Imports', () => {
         ".wxt/types/paths.d.ts
         ----------------------------------------
         // Generated by wxt
-        type EntrypointPath =
-          | \\"/background.js\\"
-          | \\"/content-scripts/overlay.js\\"
-          | \\"/popup.html\\"
+        import \\"wxt/browser\\";
+
+        declare module \\"wxt/browser\\" {
+          type PublicPath =
+            | \\"/background.js\\"
+            | \\"/content-scripts/overlay.js\\"
+            | \\"/popup.html\\"
+          export interface ProjectRuntime extends Runtime.Static {
+            getURL(path: PublicPath): string;
+          }
+        }
         "
       `);
   });
@@ -37,18 +44,18 @@ describe('Auto Imports', () => {
 
     expect(await project.serializeFile('.wxt/types/imports.d.ts'))
       .toMatchInlineSnapshot(`
-      ".wxt/types/imports.d.ts
-      ----------------------------------------
-      // Generated by wxt
-      export {}
-      declare global {
-        const browser: typeof import('webextension-polyfill')
-        const defineBackgroundScript: typeof import('wxt/client')['defineBackgroundScript']
-        const defineConfig: typeof import('wxt')['defineConfig']
-        const defineContentScript: typeof import('wxt/client')['defineContentScript']
-        const mountContentScriptUi: typeof import('wxt/client')['mountContentScriptUi']
-      }
-      "
-    `);
+        ".wxt/types/imports.d.ts
+        ----------------------------------------
+        // Generated by wxt
+        export {}
+        declare global {
+          const browser: typeof import('wxt/browser')['browser']
+          const defineBackground: typeof import('wxt/client')['defineBackground']
+          const defineConfig: typeof import('wxt')['defineConfig']
+          const defineContentScript: typeof import('wxt/client')['defineContentScript']
+          const mountContentScriptUi: typeof import('wxt/client')['mountContentScriptUi']
+        }
+        "
+      `);
   });
 });

e2e/tests/manifest-content.test.ts

@@ -57,7 +57,7 @@ describe('Manifest Content', () => {
     const optionsContent = `
       <html>
         <head>
-          <meta name="manifest.open_in_tab" content="true">
+          <meta name="manifest.open_in_tab" content="false">
           <meta name="manifest.chrome_style" content="true">
           <meta name="manifest.browser_style" content="true">
         </head>
@@ -72,7 +72,7 @@ describe('Manifest Content', () => {
       const manifest = await project.getOutputManifest();
 
       expect(manifest.options_ui).toEqual({
-        open_in_tab: true,
+        open_in_tab: false,
         chrome_style: true,
         page: 'options.html',
       });
@@ -88,7 +88,7 @@ describe('Manifest Content', () => {
       );
 
       expect(manifest.options_ui).toEqual({
-        open_in_tab: true,
+        open_in_tab: false,
         browser_style: true,
         page: 'options.html',
       });
@@ -97,7 +97,7 @@ describe('Manifest Content', () => {
 
   describe('background', () => {
     const backgroundContent = `
-      export default defineBackgroundScript({
+      export default defineBackground({
         persistent: true,
         type: "module",
         main: () => {},
@@ -149,7 +149,7 @@ describe('Manifest Content', () => {
       `import "./style.css";
       export default defineContentScript({
         matches: ["*://google.com/*"],
-        run_at: "document_end",
+        runAt: "document_end",
         main: () => {},
       })`,
     );
@@ -162,7 +162,7 @@ describe('Manifest Content', () => {
       `import "./style.css";
       export default defineContentScript({
         matches: ["*://google.com/*"],
-        run_at: "document_end",
+        runAt: "document_end",
         main: () => {},
       })`,
     );
@@ -175,7 +175,7 @@ describe('Manifest Content', () => {
       `import "./style.css";
       export default defineContentScript({
         matches: ["*://duckduckgo.com/*"],
-        run_at: "document_end",
+        runAt: "document_end",
         main: () => {},
       })`,
     );
@@ -191,21 +191,18 @@ describe('Manifest Content', () => {
     expect(manifest.content_scripts).toContainEqual({
       matches: ['*://duckduckgo.com/*'],
       run_at: 'document_end',
-      css: [expect.stringContaining('assets/four-')],
+      css: ['assets/four.css'],
       js: ['content-scripts/four.js'],
     });
     expect(manifest.content_scripts).toContainEqual({
       matches: ['*://google.com/*'],
       run_at: 'document_end',
-      css: [
-        expect.stringContaining('assets/three-'),
-        expect.stringContaining('assets/two-'),
-      ],
+      css: ['assets/three.css', 'assets/two.css'],
       js: ['content-scripts/three.js', 'content-scripts/two.js'],
     });
     expect(manifest.content_scripts).toContainEqual({
       matches: ['*://google.com/*'],
-      css: [expect.stringContaining('assets/one-')],
+      css: ['assets/one.css'],
       js: ['content-scripts/one.js'],
     });
   });

e2e/tests/output-structure.test.ts

@@ -13,7 +13,7 @@ describe('Output Directory Structure', () => {
     expect(await project.serializeOutput()).toMatchInlineSnapshot(`
       ".output/chrome-mv3/manifest.json
       ----------------------------------------
-      {\\"manifest_version\\":3,\\"name\\":\\"E2E Extension\\",\\"version\\":\\"0.0.0\\",\\"version_name\\":\\"0.0.0-test\\"}"
+      {\\"manifest_version\\":3,\\"name\\":\\"E2E Extension\\",\\"description\\":\\"Example description\\",\\"version\\":\\"0.0.0\\",\\"version_name\\":\\"0.0.0-test\\"}"
     `);
   });
 
@@ -44,33 +44,53 @@ describe('Output Directory Structure', () => {
     await project.build();
 
     expect(await project.serializeOutput()).toMatchInlineSnapshot(`
-      ".output/chrome-mv3/assets/one-dedc7a05.css
+      ".output/chrome-mv3/assets/one.css
       ----------------------------------------
       body{color:#00f}
 
       ================================================================================
-      .output/chrome-mv3/assets/two-74d94aed.css
+      .output/chrome-mv3/assets/two.css
       ----------------------------------------
       body{color:red}
 
       ================================================================================
       .output/chrome-mv3/content-scripts/one.js
       ----------------------------------------
-      (function(){\\"use strict\\";function c(n){return n}const e=\\"\\",t={matches:[\\"*://*/*\\"],main:()=>{}};(async()=>{try{await t.main()}catch(n){console.error(\`The content script crashed on startup!
-
-      \`,n)}})()})();
+      (function(){\\"use strict\\";function i(n){return n}const s=\\"\\",o={matches:[\\"*://*/*\\"],main:()=>{}};function t(n,...e){if(typeof e[0]==\\"string\\"){const c=e.shift();n(\`[wxt] \${c}\`,...e)}else n(\\"[wxt]\\",...e)}var r={debug:(...n)=>t(console.debug,...n),log:(...n)=>t(console.log,...n),warn:(...n)=>t(console.warn,...n),error:(...n)=>t(console.error,...n)};(async()=>{try{await o.main()}catch(n){r.error(\\"The content script crashed on startup!\\",n)}})()})();
 
       ================================================================================
       .output/chrome-mv3/content-scripts/two.js
       ----------------------------------------
-      (function(){\\"use strict\\";function c(n){return n}const e=\\"\\",t={matches:[\\"*://*/*\\"],main:()=>{}};(async()=>{try{await t.main()}catch(n){console.error(\`The content script crashed on startup!
-
-      \`,n)}})()})();
+      (function(){\\"use strict\\";function i(n){return n}const s=\\"\\",o={matches:[\\"*://*/*\\"],main:()=>{}};function t(n,...e){if(typeof e[0]==\\"string\\"){const c=e.shift();n(\`[wxt] \${c}\`,...e)}else n(\\"[wxt]\\",...e)}var r={debug:(...n)=>t(console.debug,...n),log:(...n)=>t(console.log,...n),warn:(...n)=>t(console.warn,...n),error:(...n)=>t(console.error,...n)};(async()=>{try{await o.main()}catch(n){r.error(\\"The content script crashed on startup!\\",n)}})()})();
 
       ================================================================================
       .output/chrome-mv3/manifest.json
       ----------------------------------------
-      {\\"manifest_version\\":3,\\"name\\":\\"E2E Extension\\",\\"version\\":\\"0.0.0\\",\\"version_name\\":\\"0.0.0-test\\",\\"content_scripts\\":[{\\"matches\\":[\\"*://*/*\\"],\\"css\\":[\\"assets/one-dedc7a05.css\\",\\"assets/two-74d94aed.css\\"],\\"js\\":[\\"content-scripts/one.js\\",\\"content-scripts/two.js\\"]}]}"
+      {\\"manifest_version\\":3,\\"name\\":\\"E2E Extension\\",\\"description\\":\\"Example description\\",\\"version\\":\\"0.0.0\\",\\"version_name\\":\\"0.0.0-test\\",\\"content_scripts\\":[{\\"matches\\":[\\"*://*/*\\"],\\"css\\":[\\"assets/one.css\\",\\"assets/two.css\\"],\\"js\\":[\\"content-scripts/one.js\\",\\"content-scripts/two.js\\"]}]}"
+    `);
+  });
+
+  it('should allow inputs with invalid JS variable names, like dashes', async () => {
+    const project = new TestProject();
+    project.addFile(
+      'entrypoints/overlay-one.content.ts',
+      `export default defineContentScript({
+        matches: ["*://*/*"],
+        main: () => {},
+      })`,
+    );
+
+    await project.build();
+
+    expect(await project.serializeOutput()).toMatchInlineSnapshot(`
+      ".output/chrome-mv3/content-scripts/overlay-one.js
+      ----------------------------------------
+      (function(){\\"use strict\\";function i(n){return n}const o={matches:[\\"*://*/*\\"],main:()=>{}};function t(n,...e){if(typeof e[0]==\\"string\\"){const c=e.shift();n(\`[wxt] \${c}\`,...e)}else n(\\"[wxt]\\",...e)}var r={debug:(...n)=>t(console.debug,...n),log:(...n)=>t(console.log,...n),warn:(...n)=>t(console.warn,...n),error:(...n)=>t(console.error,...n)};(async()=>{try{await o.main()}catch(n){r.error(\\"The content script crashed on startup!\\",n)}})()})();
+
+      ================================================================================
+      .output/chrome-mv3/manifest.json
+      ----------------------------------------
+      {\\"manifest_version\\":3,\\"name\\":\\"E2E Extension\\",\\"description\\":\\"Example description\\",\\"version\\":\\"0.0.0\\",\\"version_name\\":\\"0.0.0-test\\",\\"content_scripts\\":[{\\"matches\\":[\\"*://*/*\\"],\\"js\\":[\\"content-scripts/overlay-one.js\\"]}]}"
     `);
   });
 });

e2e/utils.ts

@@ -3,6 +3,7 @@ import fs from 'fs-extra';
 import glob from 'fast-glob';
 import { execSync } from 'child_process';
 import { InlineConfig, UserConfig, build } from '../src';
+import { normalizePath } from '../src/core/utils/paths';
 
 export class TestProject {
   files: Array<[string, string]> = [];
@@ -55,6 +56,7 @@ export class TestProject {
    */
   addFile(filename: string, content?: string) {
     this.files.push([filename, content ?? '']);
+    if (filename === 'wxt.config.ts') this.config = {};
   }
 
   /**
@@ -63,15 +65,13 @@ export class TestProject {
   async build(config: InlineConfig = {}) {
     if (this.config == null) this.setConfigFileConfig();
 
-    await Promise.all(
-      this.files.map(async (file) => {
-        const [name, content] = file;
-        const filePath = resolve(this.root, name);
-        const fileDir = dirname(filePath);
-        await fs.ensureDir(fileDir);
-        await fs.writeFile(filePath, content ?? '', 'utf-8');
-      }),
-    );
+    for (const file of this.files) {
+      const [name, content] = file;
+      const filePath = resolve(this.root, name);
+      const fileDir = dirname(filePath);
+      await fs.ensureDir(fileDir);
+      await fs.writeFile(filePath, content ?? '', 'utf-8');
+    }
     execSync('npm i --ignore-scripts', { cwd: this.root });
 
     await build({ ...config, root: this.root });
@@ -114,7 +114,7 @@ export class TestProject {
   async serializeFile(path: string): Promise<string> {
     const absolutePath = resolve(this.root, path);
     return [
-      relative(this.root, absolutePath),
+      normalizePath(relative(this.root, absolutePath)),
       await fs.readFile(absolutePath),
     ].join(`\n${''.padEnd(40, '-')}\n`);
   }

package.json

@@ -1,8 +1,12 @@
 {
   "name": "wxt",
   "type": "module",
-  "version": "0.0.1",
+  "version": "0.3.0",
   "description": "Next gen framework for developing web extensions",
+  "engines": {
+    "node": ">=18.16.0",
+    "pnpm": ">=8"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/aklinker1/wxt"
@@ -22,10 +26,9 @@
   },
   "license": "MIT",
   "files": [
-    "dist",
-    "templates"
+    "dist"
   ],
-  "bin": "dist/cli/index.cjs",
+  "bin": "dist/cli.cjs",
   "main": "./dist/index.cjs",
   "module": "./dist/index.js",
   "types": "./dist/index.d.ts",
@@ -36,56 +39,72 @@
       "types": "./dist/index.d.ts"
     },
     "./client": {
-      "require": "./dist/client/index.cjs",
-      "import": "./dist/client/index.js",
-      "types": "./dist/client/index.d.ts"
+      "import": "./dist/client.js",
+      "types": "./dist/client.d.ts"
+    },
+    "./browser": {
+      "import": "./dist/browser.js",
+      "types": "./dist/browser.d.ts"
     }
   },
   "scripts": {
     "wxt": "tsx src/cli/index.ts",
-    "build": "run-s -s build:*",
-    "build:js": "tsup src/index.ts --sourcemap --dts --format esm,cjs",
-    "build:cli": "tsup src/cli/index.ts -d dist/cli --sourcemap",
-    "build:client": "tsup src/client/index.ts -d dist/client --sourcemap --dts --format esm,cjs",
+    "build": "tsx scripts/build.ts",
     "format": "prettier --write .",
     "format:check": "prettier --write .",
     "compile": "tsc --noEmit",
     "test": "vitest",
     "test:coverage": "vitest run --coverage",
     "prepare": "simple-git-hooks",
-    "prepublish": "pnpm -s build"
+    "prepublish": "pnpm -s build",
+    "docs:dev": "vitepress dev docs",
+    "docs:build": "vitepress build docs",
+    "docs:preview": "vitepress preview docs"
   },
   "dependencies": {
+    "@types/webextension-polyfill": "^0.10.0",
+    "@webext-core/fake-browser": "^1.2.2",
+    "@webext-core/match-patterns": "^1.0.1",
+    "async-mutex": "^0.4.0",
     "c12": "^1.4.2",
     "cac": "^6.7.14",
     "consola": "^3.1.0",
     "fast-glob": "^3.2.12",
     "filesize": "^10.0.7",
     "fs-extra": "^11.1.1",
+    "get-port": "^7.0.0",
     "jiti": "^1.18.2",
     "json5": "^2.2.3",
     "linkedom": "^0.14.26",
+    "minimatch": "^9.0.3",
     "picocolors": "^1.0.0",
     "picomatch": "^2.3.1",
     "unimport": "^3.0.8",
     "vite": "^4.3.9",
+    "vite-tsconfig-paths": "^4.2.0",
     "web-ext": "^7.6.2",
-    "webextension-polyfill": "^0.10.0"
+    "webextension-polyfill": "^0.10.0",
+    "zip-dir": "^2.0.0"
   },
   "devDependencies": {
+    "@faker-js/faker": "^8.0.2",
     "@types/fs-extra": "^11.0.1",
+    "@types/lodash.merge": "^4.6.7",
     "@types/node": "^20.3.1",
     "@types/picomatch": "^2.3.0",
-    "@types/webextension-polyfill": "^0.10.0",
     "@vitest/coverage-v8": "^0.32.2",
+    "lodash.merge": "^4.6.2",
     "npm-run-all": "^4.1.5",
+    "ora": "^6.3.1",
     "prettier": "^2.8.8",
     "pretty-quick": "^3.1.3",
     "simple-git-hooks": "^2.8.1",
     "tsup": "^7.0.0",
     "tsx": "^3.12.7",
     "typescript": "^5.1.3",
-    "vitest": "^0.32.2",
+    "vitepress": "1.0.0-beta.5",
+    "vitest": "^0.32.4",
+    "vitest-mock-extended": "^1.1.4",
     "webextension-polyfill": "^0.10.0"
   },
   "peerDependencies": {
@@ -94,5 +113,16 @@
   "packageManager": "pnpm@8.6.3",
   "simple-git-hooks": {
     "pre-commit": "pnpm pretty-quick --staged"
+  },
+  "pnpm": {
+    "peerDependencyRules": {
+      "ignoreMissing": [
+        "@algolia/client-search",
+        "search-insights"
+      ],
+      "allowAny": [
+        "node-fetch"
+      ]
+    }
   }
-}
+}

scripts/build.ts

@@ -0,0 +1,84 @@
+import tsup from 'tsup';
+import glob from 'fast-glob';
+import { printFileList } from '../src/core/log/printFileList';
+import { formatDuration } from '../src/core/utils/formatDuration';
+import ora from 'ora';
+import fs from 'fs-extra';
+import { consola } from 'consola';
+
+const spinner = ora('Building WXT').start();
+
+const startTime = Date.now();
+const outDir = 'dist';
+const virtualEntrypoints = ['background', 'content-script'];
+
+await fs.rm(outDir, { recursive: true, force: true });
+
+await Promise.all([
+  tsup.build({
+    entry: {
+      index: 'src/index.ts',
+    },
+    format: ['cjs', 'esm'],
+    sourcemap: true,
+    dts: true,
+    silent: true,
+  }),
+  tsup.build({
+    entry: { cli: 'src/cli/index.ts' },
+    format: ['cjs'],
+    sourcemap: 'inline',
+    silent: true,
+  }),
+  tsup.build({
+    entry: { client: 'src/client/index.ts' },
+    format: ['esm'],
+    sourcemap: 'inline',
+    dts: true,
+    silent: true,
+  }),
+  tsup.build({
+    entry: { browser: 'src/client/browser.ts' },
+    format: ['esm'],
+    sourcemap: 'inline',
+    dts: true,
+    silent: true,
+  }),
+  ...virtualEntrypoints.map((entryName) =>
+    tsup.build({
+      entry: {
+        [`virtual-modules/${entryName}-entrypoint`]: `src/client/virtual-modules/${entryName}-entrypoint.ts`,
+      },
+      format: ['esm'],
+      sourcemap: true,
+      silent: true,
+      external: [`virtual:user-${entryName}`],
+    }),
+  ),
+  tsup.build({
+    entry: {
+      'virtual-modules/reload-html': `src/client/virtual-modules/reload-html.ts`,
+    },
+    format: ['esm'],
+    sourcemap: true,
+    silent: true,
+  }),
+  tsup.build({
+    entry: {
+      'virtual-modules/fake-browser': `src/client/virtual-modules/fake-browser.ts`,
+    },
+    format: ['esm', 'cjs'],
+    silent: true,
+  }),
+]).catch((err) => {
+  spinner.fail();
+  console.error(err);
+  process.exit(1);
+});
+
+spinner.succeed();
+
+const duration = Date.now() - startTime;
+const outFiles = await glob(`${outDir}/**`, { absolute: true });
+await printFileList(consola.log, outDir, outFiles);
+consola.success(`Finished in ${formatDuration(duration)}`);

src/@types/modules.d.ts

@@ -0,0 +1,16 @@
+declare module 'zip-dir' {
+  // Represents the options object for zipdir function
+  interface ZipDirOptions {
+    saveTo?: string;
+    filter?: (path: string, stat: import('fs').Stats) => boolean;
+    each?: (path: string) => void;
+  }
+
+  function zipdir(
+    dirPath: string,
+    options?: ZipDirOptions,
+    callback?: (error: Error | null, buffer: Buffer) => void,
+  ): Promise<Buffer>;
+
+  export = zipdir;
+}

src/@types/vitest-defines.d.ts

@@ -0,0 +1 @@
+declare const __TEST_SEED__: number;

src/cli/commands/dev.ts

@@ -23,7 +23,7 @@ export const dev = defineCommand<
   };
 
   const server = await wxt.createServer(cliConfig);
-  await server.listen(server.port);
+  await server.start();
 
   return true;
 });

src/cli/commands/index.ts

@@ -3,3 +3,4 @@ export * from './dev';
 export * from './init';
 export * from './prepare';
 export * from './publish';
+export * from './zip';

src/cli/commands/zip.ts

@@ -0,0 +1,31 @@
+import * as wxt from '../..';
+import { buildInternal } from '../../core/build';
+import { getInternalConfig } from '../../core/utils/getInternalConfig';
+import { zipExtension } from '../../core/zip';
+import { defineCommand } from '../utils/defineCommand';
+
+export const zip = defineCommand<
+  [
+    root: string | undefined,
+    flags: {
+      mode?: string;
+      config?: string;
+      browser?: wxt.TargetBrowser;
+      mv3?: boolean;
+      mv2?: boolean;
+    },
+  ]
+>(async (root, flags) => {
+  const mode = flags.mode ?? 'production';
+  const cliConfig: wxt.InlineConfig = {
+    root,
+    mode,
+    browser: flags.browser,
+    manifestVersion: flags.mv3 ? 3 : flags.mv2 ? 2 : undefined,
+    configFile: flags.config,
+  };
+
+  const config = await getInternalConfig(cliConfig, 'build');
+  const output = await buildInternal(config);
+  await zipExtension(config, output);
+});

src/cli/index.ts

@@ -28,6 +28,16 @@ cli
   .option('--mv2', 'target manifest v2')
   .action(commands.build);
 
+// ZIP
+cli
+  .command('zip [root]', 'build for production and zip output')
+  .option('-c, --config <file>', 'use specified config file')
+  .option('-m, --mode <mode>', 'set env mode')
+  .option('-b, --browser <browser>', 'specify a browser')
+  .option('--mv3', 'target manifest v3')
+  .option('--mv2', 'target manifest v2')
+  .action(commands.zip);
+
 // PREPARE
 cli
   .command('prepare [root]', 'prepare')

src/client/browser.ts

@@ -0,0 +1,11 @@
+import originalBrowser, { Browser, Runtime } from 'webextension-polyfill';
+
+export interface AugmentedBrowser extends Browser {
+  runtime: ProjectRuntime;
+}
+
+export interface ProjectRuntime extends Runtime.Static {
+  // Overriden per-project
+}
+
+export const browser: AugmentedBrowser = originalBrowser;

src/client/defineBackground.ts

@@ -1,12 +1,10 @@
 import { BackgroundScriptDefintition } from '..';
 
-export function defineBackgroundScript(
-  main: () => void,
-): BackgroundScriptDefintition;
-export function defineBackgroundScript(
+export function defineBackground(main: () => void): BackgroundScriptDefintition;
+export function defineBackground(
   definition: BackgroundScriptDefintition,
 ): BackgroundScriptDefintition;
-export function defineBackgroundScript(
+export function defineBackground(
   arg: (() => void) | BackgroundScriptDefintition,
 ): BackgroundScriptDefintition {
   if (typeof arg === 'function') return { main: arg };

src/client/index.ts

@@ -1,3 +1,3 @@
 export * from './defineContentScript';
-export * from './defineBackgroundScript';
+export * from './defineBackground';
 export * from './mountContentScriptUi';

src/client/utils/keepServiceWorkerAlive.ts

@@ -0,0 +1,11 @@
+import browser from 'webextension-polyfill';
+
+/**
+ * https://developer.chrome.com/blog/longer-esw-lifetimes/
+ */
+export function keepServiceWorkerAlive() {
+  setInterval(async () => {
+    // Calling an async browser API resets the service worker's timeout
+    await browser.runtime.getPlatformInfo();
+  }, 5e3);
+}

src/client/utils/logger.ts

@@ -0,0 +1,18 @@
+function print(method: (...args: any[]) => void, ...args: any[]) {
+  if (typeof args[0] === 'string') {
+    const message = args.shift();
+    method(`[wxt] ${message}`, ...args);
+  } else {
+    method('[wxt]', ...args);
+  }
+}
+
+/**
+ * Wrapper around `console` with a "[wxt]" prefix
+ */
+export const logger = {
+  debug: (...args: any[]) => print(console.debug, ...args),
+  log: (...args: any[]) => print(console.log, ...args),
+  warn: (...args: any[]) => print(console.warn, ...args),
+  error: (...args: any[]) => print(console.error, ...args),
+};

src/client/utils/reloadContentScript.ts

@@ -0,0 +1,48 @@
+import browser, { Manifest } from 'webextension-polyfill';
+import { logger } from './logger';
+import { MatchPattern } from '@webext-core/match-patterns';
+
+export function reloadContentScript(contentScript: Manifest.ContentScript) {
+  const manifest = browser.runtime.getManifest();
+  if (manifest.manifest_version == 2) {
+    void reloadContentScriptMv2(contentScript);
+  } else {
+    void reloadContentScriptMv3(contentScript);
+  }
+}
+
+export async function reloadContentScriptMv3(
+  contentScript: Manifest.ContentScript,
+) {
+  const id = `wxt:${contentScript.js![0]}`;
+  logger.log('Reloading content script:', contentScript);
+  const registered = await browser.scripting.getRegisteredContentScripts();
+  logger.debug('Existing scripts:', registered);
+
+  const existing = registered.find((cs) => cs.id === id);
+
+  if (existing) {
+    logger.debug('Updating content script', existing);
+    await browser.scripting.updateContentScripts([{ ...contentScript, id }]);
+  } else {
+    logger.debug('Registering new content script...');
+    await browser.scripting.registerContentScripts([{ ...contentScript, id }]);
+  }
+
+  const allTabs = await browser.tabs.query({});
+  const matchPatterns = contentScript.matches.map(
+    (match) => new MatchPattern(match),
+  );
+  const matchingTabs = allTabs.filter((tab) => {
+    const url = tab.url;
+    if (!url) return false;
+    return !!matchPatterns.find((pattern) => pattern.includes(url));
+  });
+  await Promise.all(matchingTabs.map((tab) => browser.tabs.reload(tab.id)));
+}
+
+export async function reloadContentScriptMv2(
+  contentScript: Manifest.ContentScript,
+) {
+  throw Error('TODO: reloadContentScriptMv2');
+}

src/client/utils/setupWebSocket.ts

@@ -0,0 +1,44 @@
+import { logger } from './logger';
+
+interface WebSocketMessage {
+  type: string;
+  event: string;
+  data?: any;
+}
+
+/**
+ * Connect to the websocket and listen for messages.
+ *
+ * @param onMessage Optional callback that is called when a message is recieved and we've verified
+ *                  it's structure is what we expect.
+ */
+export function setupWebSocket(
+  onMessage?: (message: WebSocketMessage) => void,
+) {
+  const serverUrl = `${__DEV_SERVER_PROTOCOL__}//${__DEV_SERVER_HOSTNAME__}:${__DEV_SERVER_PORT__}`;
+  logger.debug('Connecting to dev server @', serverUrl);
+  const ws = new WebSocket(serverUrl, 'vite-hmr');
+
+  ws.addEventListener('open', () => {
+    logger.debug('Connected to dev server');
+  });
+  ws.addEventListener('close', () => {
+    logger.debug('Disconnected from dev server');
+  });
+  ws.addEventListener('error', (event) => {
+    logger.error('Failed to connect to dev server', event);
+  });
+
+  ws.addEventListener('message', (e) => {
+    try {
+      const message = JSON.parse(e.data) as WebSocketMessage;
+      if (message.type === 'custom' && message.event?.startsWith?.('wxt:')) {
+        onMessage?.(message);
+      }
+    } catch (err) {
+      logger.error('Failed to handle message', err);
+    }
+  });
+
+  return ws;
+}

src/client/virtual-modules/background-entrypoint.ts

@@ -0,0 +1,42 @@
+import definition from 'virtual:user-background';
+import { setupWebSocket } from '../utils/setupWebSocket';
+import { logger } from '../utils/logger';
+import browser from 'webextension-polyfill';
+import { keepServiceWorkerAlive } from '../utils/keepServiceWorkerAlive';
+import { reloadContentScript } from '../utils/reloadContentScript';
+
+if (__COMMAND__ === 'serve') {
+  try {
+    const ws = setupWebSocket((message) => {
+      if (message.event === 'wxt:reload-extension') browser.runtime.reload();
+      if (message.event === 'wxt:reload-content-script' && message.data != null)
+        reloadContentScript(message.data);
+    });
+
+    if (__MANIFEST_VERSION__ === 3) {
+      // Tell the server the background script is loaded and ready to go
+      ws.addEventListener('open', () => {
+        const msg = { type: 'custom', event: 'wxt:background-initialized' };
+        ws.send(JSON.stringify(msg));
+      });
+
+      // Web Socket will disconnect if the service worker is killed
+      keepServiceWorkerAlive();
+    }
+  } catch (err) {
+    logger.error('Failed to setup web socket connection with dev server', err);
+  }
+}
+
+try {
+  const res = definition.main();
+  // @ts-expect-error: res shouldn't be a promise, but we're checking it anyways
+  if (res instanceof Promise) {
+    console.warn(
+      "The background's main() function return a promise, but it must be synchonous",
+    );
+  }
+} catch (err) {
+  logger.error('The background script crashed on startup!');
+  throw err;
+}

src/client/virtual-modules/content-script-entrypoint.ts

@@ -0,0 +1,10 @@
+import definition from 'virtual:user-content-script';
+import { logger } from '../utils/logger';
+
+(async () => {
+  try {
+    await definition.main();
+  } catch (err) {
+    logger.error('The content script crashed on startup!', err);
+  }
+})();

src/client/virtual-modules/fake-browser.ts

@@ -0,0 +1,3 @@
+import { fakeBrowser as browser } from '@webext-core/fake-browser';
+
+export default browser;

src/client/virtual-modules/reload-html.ts

@@ -0,0 +1,20 @@
+/// <reference types="vite/client" />
+
+import { logger } from '../utils/logger';
+import { setupWebSocket } from '../utils/setupWebSocket';
+
+if (__COMMAND__ === 'serve') {
+  try {
+    setupWebSocket((message) => {
+      if (message.event === 'wxt:reload-page') {
+        // We need to remove the initial slash from the path to compare correctly
+        // "popup.html" === "/popup.html".substring(1)
+        if (message.data === location.pathname.substring(1)) {
+          location.reload();
+        }
+      }
+    });
+  } catch (err) {
+    logger.error('Failed to setup web socket connection with dev server', err);
+  }
+}

src/client/virtual-modules/virtual-module-globals.d.ts

@@ -0,0 +1,23 @@
+// Types required to make the virtual modules happy.
+
+declare module '*?raw' {
+  const content: any;
+  export default content;
+}
+
+declare module 'virtual:user-background' {
+  const definition: import('../../').BackgroundScriptDefintition;
+  export default definition;
+}
+
+declare module 'virtual:user-content-script' {
+  const definition: import('../../').ContentScriptDefinition;
+  export default definition;
+}
+
+// Globals defined by the vite-plugins/devServerGlobals.ts and utils/globals.ts
+declare const __COMMAND__: 'build' | 'serve';
+declare const __DEV_SERVER_PROTOCOL__: string;
+declare const __DEV_SERVER_HOSTNAME__: string;
+declare const __DEV_SERVER_PORT__: string;
+declare const __MANIFEST_VERSION__: 2 | 3;

src/core/build.ts

@@ -0,0 +1,110 @@
+import { Manifest } from 'webextension-polyfill';
+import { BuildOutput } from './types';
+import { buildEntrypoints } from './build/buildEntrypoints';
+import { findEntrypoints } from './build/findEntrypoints';
+import { generateTypesDir } from './build/generateTypesDir';
+import { InternalConfig, EntrypointGroup } from './types';
+import { generateMainfest, writeManifest } from './utils/manifest';
+import pc from 'picocolors';
+import * as vite from 'vite';
+import fs from 'fs-extra';
+import { groupEntrypoints } from './utils/groupEntrypoints';
+import { formatDuration } from './utils/formatDuration';
+import { printBuildSummary } from './log/printBuildSummary';
+
+/**
+ * Builds the extension based on an internal config.
+ *
+ * This function:
+ * 1. Cleans the output directory
+ * 2. Executes the rebuild function with a blank previous output so everything is built (see
+ *    `rebuild` for more details)
+ * 3. Prints the summary
+ */
+export async function buildInternal(
+  config: InternalConfig,
+): Promise<BuildOutput> {
+  const verb = config.command === 'serve' ? 'Pre-rendering' : 'Building';
+  const target = `${config.browser}-mv${config.manifestVersion}`;
+  config.logger.info(
+    `${verb} ${pc.cyan(target)} for ${pc.cyan(config.mode)} with ${pc.green(
+      `Vite ${vite.version}`,
+    )}`,
+  );
+  const startTime = Date.now();
+
+  // Cleanup
+  await fs.rm(config.outDir, { recursive: true, force: true });
+  await fs.ensureDir(config.outDir);
+
+  const entrypoints = await findEntrypoints(config);
+  const groups = groupEntrypoints(entrypoints);
+  const { output } = await rebuild(config, groups, undefined);
+
+  // Post-build
+  config.logger.success(
+    `Built extension in ${formatDuration(Date.now() - startTime)}`,
+  );
+  await printBuildSummary(output, config);
+
+  return output;
+}
+
+/**
+ * Given a configuration, list of entrypoints, and an existing, partial output, build the
+ * entrypoints and merge the new output with the existing output.
+ *
+ * This function will:
+ * 1. Generate the .wxt directory's types
+ * 2. Build the `entrypointGroups` (and copies public files)
+ * 3. Generate the latest manifest for all entrypoints
+ * 4. Write the new manifest to the file system
+ */
+export async function rebuild(
+  config: InternalConfig,
+  entrypointGroups: EntrypointGroup[],
+  existingOutput: Omit<BuildOutput, 'manifest'> = {
+    steps: [],
+    publicAssets: [],
+  },
+): Promise<{ output: BuildOutput; manifest: Manifest.WebExtensionManifest }> {
+  // Update types directory with new files and types
+  const allEntrypoints = await findEntrypoints(config);
+  await generateTypesDir(allEntrypoints, config).catch((err) => {
+    config.logger.warn('Failed to update .wxt directory:', err);
+    // Throw the error if doing a regular build, don't for dev mode.
+    if (config.command === 'build') throw err;
+  });
+
+  // Build and merge the outputs
+  const newOutput = await buildEntrypoints(entrypointGroups, config);
+  const mergedOutput: Omit<BuildOutput, 'manifest'> = {
+    steps: [...existingOutput.steps, ...newOutput.steps],
+    publicAssets: [...existingOutput.publicAssets, ...newOutput.publicAssets],
+  };
+
+  const newManifest = await generateMainfest(
+    allEntrypoints,
+    mergedOutput,
+    config,
+  );
+  const finalOutput: BuildOutput = {
+    manifest: newManifest,
+    ...newOutput,
+  };
+
+  // Write manifest
+  await writeManifest(newManifest, finalOutput, config);
+
+  return {
+    output: {
+      manifest: newManifest,
+      steps: [...existingOutput.steps, ...finalOutput.steps],
+      publicAssets: [
+        ...existingOutput.publicAssets,
+        ...finalOutput.publicAssets,
+      ],
+    },
+    manifest: newManifest,
+  };
+}

src/core/build/__tests__/findEntrypoints.test.ts

@@ -7,10 +7,12 @@ import {
   PopupEntrypoint,
 } from '../../types';
 import { resolve } from 'path';
-import { FindEntrypointsConfig, findEntrypoints } from '../findEntrypoints';
+import { findEntrypoints } from '../findEntrypoints';
 import fs from 'fs-extra';
 import { importTsFile } from '../../utils/importTsFile';
 import glob from 'fast-glob';
+import { fakeInternalConfig } from '../../../testing/fake-objects';
+import { unnormalizePath } from '../../utils/paths';
 
 vi.mock('../../utils/importTsFile');
 const importTsFileMock = vi.mocked(importTsFile);
@@ -24,24 +26,12 @@ const readFileMock = vi.mocked(
 );
 
 describe('findEntrypoints', () => {
-  const config: FindEntrypointsConfig = {
+  const config = fakeInternalConfig({
     root: '/',
     entrypointsDir: resolve('/src/entrypoints'),
     outDir: resolve('.output'),
-    logger: {
-      debug: vi.fn(),
-      error: vi.fn(),
-      fatal: (...args) => {
-        throw Error('logger.fatal called with: ' + JSON.stringify(args));
-      },
-      info: vi.fn(),
-      log: vi.fn(),
-      warn: vi.fn(),
-      success: vi.fn(),
-    },
     command: 'build',
-    mode: 'production',
-  };
+  });
 
   it.each<[string, string, PopupEntrypoint]>([
     [
@@ -149,6 +139,15 @@ describe('findEntrypoints', () => {
   );
 
   it.each<[string, Omit<ContentScriptEntrypoint, 'options'>]>([
+    [
+      'content.ts',
+      {
+        type: 'content-script',
+        name: 'content',
+        inputPath: resolve(config.entrypointsDir, 'content.ts'),
+        outputDir: resolve(config.outDir, 'content-scripts'),
+      },
+    ],
     [
       'overlay.content.ts',
       {
@@ -158,6 +157,15 @@ describe('findEntrypoints', () => {
         outputDir: resolve(config.outDir, 'content-scripts'),
       },
     ],
+    [
+      'content/index.ts',
+      {
+        type: 'content-script',
+        name: 'content',
+        inputPath: resolve(config.entrypointsDir, 'content/index.ts'),
+        outputDir: resolve(config.outDir, 'content-scripts'),
+      },
+    ],
     [
       'overlay.content/index.ts',
       {
@@ -189,7 +197,7 @@ describe('findEntrypoints', () => {
 
       expect(entrypoints).toHaveLength(1);
       expect(entrypoints[0]).toEqual({ ...expected, options });
-      expect(importTsFileMock).toBeCalledWith(config.root, expected.inputPath);
+      expect(importTsFileMock).toBeCalledWith(expected.inputPath, config);
     },
   );
 
@@ -204,10 +212,10 @@ describe('findEntrypoints', () => {
       },
     ],
   ])(
-    'should find and load content script entrypoint config from %s',
+    'should find and load background entrypoint config from %s',
     async (path, expected) => {
-      const options: ContentScriptEntrypoint['options'] = {
-        matches: ['<all_urls>'],
+      const options: BackgroundEntrypoint['options'] = {
+        type: 'module',
       };
       globMock.mockResolvedValueOnce([path]);
       importTsFileMock.mockResolvedValue(options);
@@ -216,10 +224,28 @@ describe('findEntrypoints', () => {
 
       expect(entrypoints).toHaveLength(1);
       expect(entrypoints[0]).toEqual({ ...expected, options });
-      expect(importTsFileMock).toBeCalledWith(config.root, expected.inputPath);
+      expect(importTsFileMock).toBeCalledWith(expected.inputPath, config);
     },
   );
 
+  it("should include a virtual background script so dev reloading works when there isn't a background entrypoint defined by the user", async () => {
+    globMock.mockResolvedValueOnce([]);
+
+    const entrypoints = await findEntrypoints({
+      ...config,
+      command: 'serve',
+    });
+
+    expect(entrypoints).toHaveLength(1);
+    expect(entrypoints[0]).toEqual({
+      type: 'background',
+      inputPath: 'virtual:user-background',
+      name: 'background',
+      options: {},
+      outputDir: config.outDir,
+    });
+  });
+
   it.each<[string, GenericEntrypoint]>([
     // Sandbox
     [
@@ -418,9 +444,14 @@ describe('findEntrypoints', () => {
 
   it('should not allow multiple entrypoints with the same name', async () => {
     globMock.mockResolvedValueOnce(['popup.html', 'popup/index.html']);
+    const expectedPaths = [
+      'src/entrypoints/popup.html',
+      'src/entrypoints/popup/index.html',
+    ].map(unnormalizePath);
 
     await expect(() => findEntrypoints(config)).rejects.toThrowError(
-      'Multiple entrypoints with the name "popup" detected, but only one is allowed: src/entrypoints/popup.html, src/entrypoints/popup/index.html',
+      'Multiple entrypoints with the name "popup" detected, but only one is allowed: ' +
+        expectedPaths.join(', '),
     );
   });
 });

src/core/build/buildEntrypoints.ts

@@ -1,33 +1,35 @@
 import * as vite from 'vite';
-import { BuildOutput, Entrypoint, InternalConfig } from '../types';
-import { groupEntrypoints } from '../utils/groupEntrypoints';
+import {
+  BuildOutput,
+  BuildStepOutput,
+  Entrypoint,
+  EntrypointGroup,
+  InternalConfig,
+} from '../types';
 import * as plugins from '../vite-plugins';
 import { removeEmptyDirs } from '../utils/removeEmptyDirs';
 import { getEntrypointBundlePath } from '../utils/entrypoints';
-import glob from 'fast-glob';
 import fs from 'fs-extra';
 import { dirname, resolve } from 'path';
+import { getPublicFiles } from '../utils/public';
 
 export async function buildEntrypoints(
-  entrypoints: Entrypoint[],
+  groups: EntrypointGroup[],
   config: InternalConfig,
-): Promise<BuildOutput> {
-  const groups = groupEntrypoints(entrypoints);
-
-  const outputs: BuildOutput[] = [];
+): Promise<Omit<BuildOutput, 'manifest'>> {
+  const steps: BuildStepOutput[] = [];
   for (const group of groups) {
-    const output = Array.isArray(group)
+    const step = Array.isArray(group)
       ? await buildMultipleEntrypoints(group, config)
       : await buildSingleEntrypoint(group, config);
-    outputs.push(output);
+    steps.push(step);
   }
-  const publicOutput = await copyPublicDirectory(config);
-  outputs.push(publicOutput);
+  const publicAssets = await copyPublicDirectory(config);
 
   // Remove any empty directories from moving outputs around
   await removeEmptyDirs(config.outDir);
 
-  return outputs.flat();
+  return { publicAssets, steps };
 }
 
 /**
@@ -36,23 +38,25 @@ export async function buildEntrypoints(
 async function buildSingleEntrypoint(
   entrypoint: Entrypoint,
   config: InternalConfig,
-): Promise<BuildOutput> {
+): Promise<BuildStepOutput> {
   // Should this entrypoint be wrapped by the vite-plugins/virtualEntrypoint plugin?
   const isVirtual = ['background', 'content-script'].includes(entrypoint.type);
   const entry = isVirtual
     ? `virtual:wxt-${entrypoint.type}?${entrypoint.inputPath}`
     : entrypoint.inputPath;
 
-  const libMode: vite.InlineConfig = {
+  const libMode: vite.UserConfig = {
     build: {
       lib: {
         entry,
         formats: ['iife'],
-        name: entrypoint.name,
+        name: '_',
         fileName: entrypoint.name,
       },
       rollupOptions: {
         output: {
+          // There's only a single output for this build, so we use the desired bundle path for the
+          // entry output (like "content-scripts/overlay.js")
           entryFileNames: getEntrypointBundlePath(
             entrypoint,
             config.outDir,
@@ -61,7 +65,7 @@ async function buildSingleEntrypoint(
           // Output content script CSS to assets/ with a hash to prevent conflicts. Defaults to
           // "[name].[ext]" in lib mode, which usually results in "style.css". That means multiple
           // content scripts with styles would overwrite each other if it weren't changed below.
-          assetFileNames: `assets/${entrypoint.name}-[hash].[ext]`,
+          assetFileNames: `assets/${entrypoint.name}.[ext]`,
         },
       },
     },
@@ -72,7 +76,10 @@ async function buildSingleEntrypoint(
   ) as vite.InlineConfig;
 
   const result = await vite.build(entryConfig);
-  return getBuildOutput(result);
+  return {
+    entrypoints: entrypoint,
+    chunks: getBuildOutputChunks(result),
+  };
 }
 
 /**
@@ -81,8 +88,8 @@ async function buildSingleEntrypoint(
 async function buildMultipleEntrypoints(
   entrypoints: Entrypoint[],
   config: InternalConfig,
-): Promise<BuildOutput> {
-  const multiPage: vite.InlineConfig = {
+): Promise<BuildStepOutput> {
+  const multiPage: vite.UserConfig = {
     plugins: [plugins.multipageMove(entrypoints, config)],
     build: {
       rollupOptions: {
@@ -90,6 +97,14 @@ async function buildMultipleEntrypoints(
           input[entry.name] = entry.inputPath;
           return input;
         }, {}),
+        output: {
+          // Include a hash to prevent conflicts
+          chunkFileNames: 'chunks/[name]-[hash].js',
+          // Include a hash to prevent conflicts
+          entryFileNames: 'chunks/[name]-[hash].js',
+          // We can't control the "name", so we need a hash to prevent conflicts
+          assetFileNames: 'assets/[name]-[hash].[ext]',
+        },
       },
     },
   };
@@ -97,15 +112,18 @@ async function buildMultipleEntrypoints(
   const entryConfig = vite.mergeConfig(
     multiPage,
     config.vite,
-  ) as vite.InlineConfig;
+  ) as vite.UserConfig;
 
   const result = await vite.build(entryConfig);
-  return getBuildOutput(result);
+  return {
+    entrypoints,
+    chunks: getBuildOutputChunks(result),
+  };
 }
 
-function getBuildOutput(
+function getBuildOutputChunks(
   result: Awaited<ReturnType<typeof vite.build>>,
-): BuildOutput {
+): BuildStepOutput['chunks'] {
   if ('on' in result) throw Error('wxt does not support vite watch mode.');
   if (Array.isArray(result)) return result.flatMap(({ output }) => output);
   return result.output;
@@ -113,19 +131,18 @@ function getBuildOutput(
 
 async function copyPublicDirectory(
   config: InternalConfig,
-): Promise<BuildOutput> {
-  if (!(await fs.exists(config.publicDir))) return [];
+): Promise<BuildOutput['publicAssets']> {
+  const files = await getPublicFiles(config);
+  if (files.length === 0) return [];
 
-  const files = await glob('**/*', { cwd: config.publicDir });
-
-  const outputs: BuildOutput = [];
+  const publicAssets: BuildOutput['publicAssets'] = [];
   for (const file of files) {
     const srcPath = resolve(config.publicDir, file);
     const outPath = resolve(config.outDir, file);
 
     await fs.ensureDir(dirname(outPath));
     await fs.copyFile(srcPath, outPath);
-    outputs.push({
+    publicAssets.push({
       type: 'asset',
       fileName: file,
       name: file,
@@ -133,5 +150,6 @@ async function copyPublicDirectory(
       source: await fs.readFile(srcPath),
     });
   }
-  return outputs;
+
+  return publicAssets;
 }

src/core/build/findEntrypoints.ts

@@ -16,12 +16,13 @@ import JSON5 from 'json5';
 import { importTsFile } from '../utils/importTsFile';
 import glob from 'fast-glob';
 import { getEntrypointName } from '../utils/entrypoints';
+import { VIRTUAL_NOOP_BACKGROUND_MODULE_ID } from '../vite-plugins/noopBackground';
 
 /**
- * Return entrypoints and their configuration by looking through the
+ * Return entrypoints and their configuration by looking through the project's files.
  */
 export async function findEntrypoints(
-  config: FindEntrypointsConfig,
+  config: InternalConfig,
 ): Promise<Entrypoint[]> {
   const relativePaths = await glob('**/*', {
     cwd: config.entrypointsDir,
@@ -33,6 +34,7 @@ export async function findEntrypoints(
   const existingNames: Record<string, Entrypoint | undefined> = {};
 
   const entrypoints: Entrypoint[] = [];
+  let hasBackground = false;
   await Promise.all(
     relativePaths.map(async (relativePath) => {
       const path = resolve(config.entrypointsDir, relativePath);
@@ -63,11 +65,12 @@ export async function findEntrypoints(
           break;
         case 'background':
           entrypoint = await getBackgroundEntrypoint(config, path);
+          hasBackground = true;
           break;
         case 'content-script':
           entrypoint = await getContentScriptEntrypoint(
             config,
-            relativePath.split('.', 2)[0],
+            getEntrypointName(config.entrypointsDir, path),
             path,
           );
           break;
@@ -95,6 +98,11 @@ export async function findEntrypoints(
       existingNames[entrypoint.name] = entrypoint;
     }),
   );
+  if (config.command === 'serve' && !hasBackground) {
+    entrypoints.push(
+      await getBackgroundEntrypoint(config, VIRTUAL_NOOP_BACKGROUND_MODULE_ID),
+    );
+  }
   return entrypoints;
 }
 
@@ -103,7 +111,7 @@ export async function findEntrypoints(
  * @param content String contents of the file at the path.
  */
 async function getPopupEntrypoint(
-  config: FindEntrypointsConfig,
+  config: InternalConfig,
   path: string,
 ): Promise<PopupEntrypoint> {
   const options: PopupEntrypoint['options'] = {};
@@ -150,7 +158,7 @@ async function getPopupEntrypoint(
  * @param content String contents of the file at the path.
  */
 async function getOptionsEntrypoint(
-  config: FindEntrypointsConfig,
+  config: InternalConfig,
   path: string,
 ): Promise<OptionsEntrypoint> {
   const options: OptionsEntrypoint['options'] = {};
@@ -162,21 +170,21 @@ async function getOptionsEntrypoint(
     .querySelector("meta[name='manifest.open_in_tab']")
     ?.getAttribute('content');
   if (openInTabContent) {
-    options.openInTab = Boolean(openInTabContent);
+    options.openInTab = openInTabContent === 'true';
   }
 
   const chromeStyleContent = document
     .querySelector("meta[name='manifest.chrome_style']")
     ?.getAttribute('content');
   if (chromeStyleContent) {
-    options.chromeStyle = Boolean(chromeStyleContent);
+    options.chromeStyle = chromeStyleContent === 'true';
   }
 
   const browserStyleContent = document
     .querySelector("meta[name='manifest.browser_style']")
     ?.getAttribute('content');
   if (browserStyleContent) {
-    options.browserStyle = Boolean(browserStyleContent);
+    options.browserStyle = browserStyleContent === 'true';
   }
 
   return {
@@ -192,13 +200,20 @@ async function getOptionsEntrypoint(
  * @param path Absolute path to the background's TS file.
  */
 async function getBackgroundEntrypoint(
-  config: FindEntrypointsConfig,
+  config: InternalConfig,
   path: string,
 ): Promise<BackgroundEntrypoint> {
-  const { main: _, ...options } =
-    await importTsFile<BackgroundScriptDefintition>(config.root, path);
-  if (options == null) {
-    throw Error('Background script does not have a default export');
+  let options: Omit<BackgroundScriptDefintition, 'main'> = {};
+  if (path !== VIRTUAL_NOOP_BACKGROUND_MODULE_ID) {
+    const defaultExport = await importTsFile<BackgroundScriptDefintition>(
+      path,
+      config,
+    );
+    if (defaultExport == null) {
+      throw Error('Background script does not have a default export');
+    }
+    const { main: _, ...moduleOptions } = defaultExport;
+    options = moduleOptions;
   }
   return {
     type: 'background',
@@ -213,13 +228,13 @@ async function getBackgroundEntrypoint(
  * @param path Absolute path to the content script's TS file.
  */
 async function getContentScriptEntrypoint(
-  config: FindEntrypointsConfig,
+  config: InternalConfig,
   name: string,
   path: string,
 ): Promise<ContentScriptEntrypoint> {
   const { main: _, ...options } = await importTsFile<ContentScriptDefinition>(
-    config.root,
     path,
+    config,
   );
   if (options == null) {
     throw Error(`Content script ${name} does not have a default export`);
@@ -257,7 +272,10 @@ const PATH_GLOB_TO_TYPE_MAP: Record<string, Entrypoint['type'] | 'ignored'> = {
   'devtools/index.html': 'devtools',
 
   'background.ts': 'background',
+  [VIRTUAL_NOOP_BACKGROUND_MODULE_ID]: 'background',
 
+  'content.ts?(x)': 'content-script',
+  'content/index.ts?(x)': 'content-script',
   '*.content.ts?(x)': 'content-script',
   '*.content/index.ts?(x)': 'content-script',
 
@@ -274,8 +292,3 @@ const PATH_GLOB_TO_TYPE_MAP: Record<string, Entrypoint['type'] | 'ignored'> = {
   // Don't warn about any files in subdirectories, like CSS or JS entrypoints for HTML files
   '*/*': 'ignored',
 };
-
-export type FindEntrypointsConfig = Pick<
-  InternalConfig,
-  'root' | 'entrypointsDir' | 'outDir' | 'logger' | 'mode' | 'command'
->;

src/core/build/generateTypesDir.ts

@@ -5,6 +5,8 @@ import { relative, resolve } from 'path';
 import { getEntrypointBundlePath } from '../utils/entrypoints';
 import { getUnimportOptions } from '../utils/auto-imports';
 import { getGlobals } from '../utils/globals';
+import { getPublicFiles } from '../utils/public';
+import { normalizePath } from '../utils/paths';
 
 /**
  * Generate and write all the files inside the `InternalConfig.typesDir` directory.
@@ -48,23 +50,35 @@ async function writePathsDeclarationFile(
   config: InternalConfig,
 ): Promise<string> {
   const filePath = resolve(config.typesDir, 'paths.d.ts');
+  const unions = entrypoints
+    .map((entry) =>
+      getEntrypointBundlePath(
+        entry,
+        config.outDir,
+        entry.inputPath.endsWith('.html') ? '.html' : '.js',
+      ),
+    )
+    .concat(await getPublicFiles(config))
+    .map(normalizePath)
+    .map((path) => `    | "/${path}"`)
+    .sort()
+    .join('\n');
+
+  const template = `// Generated by wxt
+import "wxt/browser";
+
+declare module "wxt/browser" {
+  type PublicPath =
+{{ union }}
+  export interface ProjectRuntime extends Runtime.Static {
+    getURL(path: PublicPath): string;
+  }
+}
+`;
 
   await fs.writeFile(
     filePath,
-    [
-      '// Generated by wxt',
-      'type EntrypointPath =',
-      ...entrypoints
-        .map((entry) => {
-          const path = getEntrypointBundlePath(
-            entry,
-            config.outDir,
-            entry.inputPath.endsWith('.html') ? '.html' : '.js',
-          );
-          return `  | "/${path}"`;
-        })
-        .sort(),
-    ].join('\n') + '\n',
+    template.replace('{{ union }}', unions || '    | never'),
   );
 
   return filePath;
@@ -99,8 +113,10 @@ async function writeMainDeclarationFile(
     filePath,
     [
       '// Generated by wxt',
+      `/// <reference types="vite/client" />`,
       ...references.map(
-        (ref) => `/// <reference types="./${relative(dir, ref)}" />`,
+        (ref) =>
+          `/// <reference types="./${normalizePath(relative(dir, ref))}" />`,
       ),
     ].join('\n') + '\n',
   );
@@ -123,18 +139,26 @@ async function writeTsConfigFile(
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "resolveJsonModule": true,
-
-    /* Type Checking */
     "strict": true,
-
-    /* Completeness */
-    "skipLibCheck": true
+    "lib": ["DOM", "WebWorker"],
+    "skipLibCheck": true,
+    "baseUrl": "${normalizePath(relative(dir, config.root))}",
+    "paths": {
+      "@@": ["."],
+      "@@/*": ["./*"],
+      "~~": ["."],
+      "~~/*": ["./*"],
+      "@": ["${normalizePath(relative(config.root, config.srcDir))}"],
+      "@/*": ["${normalizePath(relative(config.root, config.srcDir))}/*"],
+      "~": ["${normalizePath(relative(config.root, config.srcDir))}"],
+      "~/*": ["${normalizePath(relative(config.root, config.srcDir))}/*"]
+    }
   },
   "include": [
-    "${relative(dir, config.root)}/**/*",
-    "./${relative(dir, mainReference)}"
+    "${normalizePath(relative(dir, config.root))}/**/*",
+    "./${normalizePath(relative(dir, mainReference))}"
   ],
-  "exclude": ["${relative(dir, config.outBaseDir)}"]
+  "exclude": ["${normalizePath(relative(dir, config.outBaseDir))}"]
 }`,
   );
 }

src/core/log/printBuildSummary.ts

@@ -1,67 +1,38 @@
-import path, { extname, relative, resolve } from 'path';
+import { resolve } from 'path';
 import { BuildOutput, InternalConfig } from '../types';
-import { printTable } from './printTable';
-import pc from 'picocolors';
-import fs from 'fs-extra';
-import { filesize } from 'filesize';
+import { printFileList } from './printFileList';
 
 export async function printBuildSummary(
   output: BuildOutput,
   config: InternalConfig,
 ) {
-  const chunks = output.sort((l, r) => {
-    const lWeight =
-      CHUNK_SORT_WEIGHTS[l.fileName] ??
-      CHUNK_SORT_WEIGHTS[extname(l.fileName)] ??
-      DEFAULT_SORT_WEIGHT;
-    const rWeight =
-      CHUNK_SORT_WEIGHTS[r.fileName] ??
-      CHUNK_SORT_WEIGHTS[extname(r.fileName)] ??
-      DEFAULT_SORT_WEIGHT;
+  const chunks = [
+    ...output.steps.flatMap((step) => step.chunks),
+    ...output.publicAssets,
+  ].sort((l, r) => {
+    const lWeight = getChunkSortWeight(l.fileName);
+    const rWeight = getChunkSortWeight(r.fileName);
     const diff = lWeight - rWeight;
     if (diff !== 0) return diff;
     return l.fileName.localeCompare(r.fileName);
   });
 
-  let totalSize = 0;
-
-  const chunkRows: string[][] = await Promise.all(
-    chunks.map(async (chunk, i) => {
-      const file = [
-        relative(process.cwd(), config.outDir) + path.sep,
-        chunk.fileName,
-      ];
-      const ext = extname(chunk.fileName);
-      const prefix = i === chunks.length - 1 ? '  └─' : '  ├─';
-      const color = CHUNK_COLORS[ext] ?? DEFAULT_COLOR;
-      const stats = await fs.lstat(resolve(config.outDir, chunk.fileName));
-      totalSize += stats.size;
-      const size = String(filesize(stats.size));
-      return [
-        `${pc.gray(prefix)} ${pc.dim(file[0])}${color(file[1])}`,
-        pc.dim(size),
-      ];
-    }),
-  );
-
-  printTable(config.logger.log, chunkRows);
-
-  config.logger.log(
-    `${pc.cyan('Σ Total size:')} ${String(filesize(totalSize))}`,
-  );
+  const files = chunks.map((chunk) => resolve(config.outDir, chunk.fileName));
+  await printFileList(config.logger.log, config.outDir, files);
 }
 
 const DEFAULT_SORT_WEIGHT = 100;
 const CHUNK_SORT_WEIGHTS: Record<string, number> = {
   'manifest.json': 0,
   '.html': 1,
+  '.js.map': 2,
   '.js': 2,
   '.css': 3,
 };
-
-const DEFAULT_COLOR = pc.blue;
-const CHUNK_COLORS: Record<string, (text: string) => string> = {
-  '.html': pc.green,
-  '.css': pc.magenta,
-  '.js': pc.cyan,
-};
+function getChunkSortWeight(filename: string) {
+  return (
+    Object.entries(CHUNK_SORT_WEIGHTS).find(([key]) =>
+      filename.endsWith(key),
+    )?.[1] ?? DEFAULT_SORT_WEIGHT
+  );
+}

src/core/log/printFileList.ts

@@ -0,0 +1,50 @@
+import path from 'node:path';
+import pc from 'picocolors';
+import fs from 'fs-extra';
+import { filesize } from 'filesize';
+import { printTable } from './printTable';
+
+export async function printFileList(
+  log: (message: string) => void,
+  baseDir: string,
+  files: string[],
+): Promise<void> {
+  let totalSize = 0;
+
+  const fileRows: string[][] = await Promise.all(
+    files.map(async (file, i) => {
+      const parts = [
+        path.relative(process.cwd(), baseDir) + path.sep,
+        path.relative(baseDir, file),
+      ];
+      const prefix = i === files.length - 1 ? '  └─' : '  ├─';
+      const color = getChunkColor(file);
+      const stats = await fs.lstat(file);
+      totalSize += stats.size;
+      const size = String(filesize(stats.size));
+      return [
+        `${pc.gray(prefix)} ${pc.dim(parts[0])}${color(parts[1])}`,
+        pc.dim(size),
+      ];
+    }),
+  );
+
+  printTable(log, fileRows);
+
+  log(`${pc.cyan('Σ Total size:')} ${String(filesize(totalSize))}`);
+}
+
+const DEFAULT_COLOR = pc.blue;
+const CHUNK_COLORS: Record<string, (text: string) => string> = {
+  '.js.map': pc.gray,
+  '.html': pc.green,
+  '.css': pc.magenta,
+  '.js': pc.cyan,
+  '.zip': pc.yellow,
+};
+function getChunkColor(filename: string) {
+  return (
+    Object.entries(CHUNK_COLORS).find(([key]) => filename.endsWith(key))?.[1] ??
+    DEFAULT_COLOR
+  );
+}

src/core/server.ts

@@ -0,0 +1,133 @@
+import {
+  BuildStepOutput,
+  EntrypointGroup,
+  InternalConfig,
+  WxtDevServer,
+} from './types';
+import * as vite from 'vite';
+import { Scripting } from 'webextension-polyfill';
+import { getEntrypointBundlePath } from './utils/entrypoints';
+import { getContentScriptCssFiles } from './utils/manifest';
+import { createWebExtRunner } from './runners/createWebExtRunner';
+import { buildInternal } from './build';
+
+export async function getServerInfo(): Promise<ServerInfo> {
+  const { default: getPort, portNumbers } = await import('get-port');
+  const port = await getPort({ port: portNumbers(3000, 3010) });
+  const hostname = 'localhost';
+  const origin = `http://${hostname}:${port}`;
+  const serverConfig: vite.InlineConfig = {
+    server: {
+      origin,
+    },
+  };
+
+  return {
+    port,
+    hostname,
+    origin,
+    viteServerConfig: serverConfig,
+  };
+}
+
+export async function setupServer(
+  serverInfo: ServerInfo,
+  config: InternalConfig,
+): Promise<WxtDevServer> {
+  const runner = createWebExtRunner();
+
+  const viteServer = await vite.createServer(
+    vite.mergeConfig(serverInfo, config.vite),
+  );
+
+  const start = async () => {
+    await viteServer.listen(server.port);
+    config.logger.success(`Started dev server @ ${serverInfo.origin}`);
+
+    server.currentOutput = await buildInternal(config);
+    config.logger.info('Opening browser...');
+    await runner.openBrowser(config);
+    config.logger.success('Opened!');
+  };
+
+  const reloadExtension = () => {
+    viteServer.ws.send('wxt:reload-extension');
+  };
+  const reloadPage = (path: string) => {
+    // Can't use Vite's built-in "full-reload" event because it doesn't like our paths, it expects
+    // paths ending in "/index.html"
+    viteServer.ws.send('wxt:reload-page', path);
+  };
+  const reloadContentScript = (
+    contentScript: Omit<Scripting.RegisteredContentScript, 'id'>,
+  ) => {
+    viteServer.ws.send('wxt:reload-content-script', contentScript);
+  };
+
+  const server: WxtDevServer = {
+    ...viteServer,
+    start,
+    currentOutput: {
+      manifest: {
+        manifest_version: 3,
+        name: '',
+        version: '',
+      },
+      publicAssets: [],
+      steps: [],
+    },
+    port: serverInfo.port,
+    hostname: serverInfo.hostname,
+    origin: serverInfo.origin,
+    reloadExtension,
+    reloadPage,
+    reloadContentScript,
+  };
+
+  return server;
+}
+
+/**
+ * From the server, tell the client to reload content scripts from the provided build step outputs.
+ */
+export function reloadContentScripts(
+  steps: BuildStepOutput[],
+  config: InternalConfig,
+  server: WxtDevServer,
+) {
+  if (config.manifestVersion === 3) {
+    steps.forEach((step) => {
+      const entry = step.entrypoints;
+      if (Array.isArray(entry) || entry.type !== 'content-script') return;
+
+      const js = [getEntrypointBundlePath(entry, config.outDir, '.js')];
+      const css = getContentScriptCssFiles([entry], server.currentOutput);
+
+      server.reloadContentScript({
+        ...entry.options,
+        js,
+        css,
+      });
+    });
+  } else {
+    server.reloadExtension();
+  }
+}
+
+export function reloadHtmlPages(
+  groups: EntrypointGroup[],
+  server: WxtDevServer,
+  config: InternalConfig,
+) {
+  groups.flat().forEach((entry) => {
+    const path = getEntrypointBundlePath(entry, config.outDir, '.html');
+    server.reloadPage(path);
+  });
+}
+
+interface ServerInfo {
+  port: number;
+  hostname: string;
+  origin: string;
+  viteServerConfig: vite.InlineConfig;
+}

src/core/types/external.ts

@@ -1,27 +1,148 @@
 import * as vite from 'vite';
-import { Manifest } from 'webextension-polyfill';
+import { Manifest, Scripting } from 'webextension-polyfill';
 import { UnimportOptions } from 'unimport';
+import { EntrypointGroup } from '.';
 
 export interface InlineConfig {
+  /**
+   * Project root directory.
+   *
+   * @default
+   * process.cwd()
+   */
   root?: string;
+  /**
+   * Directory containing all source code. Set to `"src"` to move all source code to a `src/`
+   * directory.
+   *
+   * @default
+   * "<rootDir>"
+   */
   srcDir?: string;
+  /**
+   * Directory containing files that will be copied to the output directory as-is.
+   *
+   * @default
+   * "<rootDir>/publicDir"
+   */
   publicDir?: string;
+  /**
+   * @default
+   * "<srcDir>/entrypoints"
+   */
   entrypointsDir?: string;
+  /**
+   * Path to `"wxt.config.ts"` file or false to disable config file discovery.
+   *
+   * @default
+   * "wxt.config.ts"
+   */
   configFile?: string | false;
+  /**
+   * ID of the extension for each store. Used for publishing.
+   */
   storeIds?: {
     chrome?: string;
     firefox?: string;
     edge?: string;
   };
+  /**
+   * Explicitly set a mode to run in. This will override the default mode for each command, and can
+   * be overridden by the command line `--mode` option.
+   */
   mode?: string;
+  /**
+   * Customize auto-import options.
+   */
   imports?: Partial<UnimportOptions>;
+  /**
+   * Explicitly set a browser to target. This will override the default browser for each command,
+   * and can be overridden by the command line `--browser` option.
+   *
+   * @default
+   * "chrome"
+   */
   browser?: TargetBrowser;
+  /**
+   * Explicitly set a manifest version to target. This will override the default manifest version
+   * for each command, and can be overridden by the command line `--mv2` or `--mv3` option.
+   */
   manifestVersion?: TargetManifestVersion;
+  /**
+   * Override the logger used.
+   *
+   * @default
+   * consola
+   */
   logger?: Logger;
-  vite?: Omit<vite.InlineConfig, 'root' | 'configFile' | 'mode'>;
-  manifest?: UserManifest;
+  /**
+   * Custom Vite options.
+   */
+  vite?: Omit<vite.UserConfig, 'root' | 'configFile' | 'mode'>;
+  /**
+   * Customize the `manifest.json` output. Can be an object, promise, or function that returns an
+   * object or promise.
+   */
+  manifest?: UserManifest | Promise<UserManifest> | UserManifestFn;
+  /**
+   * Custom server options.
+   */
   server?: WxtDevServer;
+  /**
+   * Custom runner options. Options set here can be overridden in a `web-ext.config.ts` file.
+   */
   runner?: ExtensionRunnerConfig;
+  zip?: {
+    /**
+     * Configure the filename output when zipping files.
+     *
+     * Available template variables:
+     *
+     * - `{{name}}` - The project's name converted to kebab-case
+     * - `{{version}} - The version_name or version from the manifest
+     * - `{{browser}} - The target browser from the `--browser` CLI flag
+     * - `{{manifestVersion}}` - Either "2" or "3"
+     *
+     * @default "{{name}}-{{version}}-{{browser}}.zip"
+     */
+    artifactTemplate?: string;
+    /**
+     * Configure the filename output when zipping files.
+     *
+     * Available template variables:
+     *
+     * - `{{name}}` - The project's name converted to kebab-case
+     * - `{{version}} - The version_name or version from the manifest
+     * - `{{browser}} - The target browser from the `--browser` CLI flag
+     * - `{{manifestVersion}}` - Either "2" or "3"
+     *
+     * @default "{{name}}-{{version}}-sources.zip"
+     */
+    sourcesTemplate?: string;
+    /**
+     * Override the artifactTemplate's `{{name}}` template variable. Defaults to the package.json's
+     * name, or if that doesn't exist, the current working directories name.
+     */
+    name?: string;
+    /**
+     * Root directory to ZIP. The ZIP can be uploaded to the Firefox Addon Store as your source
+     * code. Defaults to the `config.root` directory.
+     */
+    sourcesRoot?: string;
+    /**
+     * [Minimatch](https://www.npmjs.com/package/minimatch) patterns of files to exclude when
+     * creating a ZIP of all your source code for Firfox. Patterns are relative to your
+     * `config.zip.sourcesRoot`.
+     *
+     * Hidden files, node_modules, and tests are ignored by default.
+     *
+     * @example
+     * [
+     *   "coverage", // Ignore the coverage directory in the `sourcesRoot`
+     * ]
+     */
+    ignoredSources?: string[];
+  };
 }
 
 export interface WxtInlineViteConfig
@@ -29,13 +150,62 @@ export interface WxtInlineViteConfig
   build?: Omit<vite.BuildOptions, 'outDir'>;
 }
 
-export type BuildOutput = (vite.Rollup.OutputChunk | vite.Rollup.OutputAsset)[];
+export interface BuildOutput {
+  manifest: Manifest.WebExtensionManifest;
+  publicAssets: vite.Rollup.OutputAsset[];
+  steps: BuildStepOutput[];
+}
+
+export interface BuildStepOutput {
+  entrypoints: EntrypointGroup;
+  chunks: (vite.Rollup.OutputChunk | vite.Rollup.OutputAsset)[];
+}
 
 export interface WxtDevServer extends vite.ViteDevServer {
-  logger: Logger;
+  /**
+   * Ex: `3000`
+   */
   port: number;
+  /**
+   * Ex: `"localhost"`
+   */
   hostname: string;
+  /**
+   * Ex: `"http://localhost:3000"`
+   */
   origin: string;
+  /**
+   * Stores the current build output of the server.
+   */
+  currentOutput: BuildOutput;
+  /**
+   * Start the server on the first open port.
+   */
+  start(): Promise<void>;
+  /**
+   * Tell the extension to reload by running `browser.runtime.reload`.
+   */
+  reloadExtension: () => void;
+  /**
+   * Tell an extension page to reload.
+   *
+   * The path is the bundle path, not the input paths, so if the input paths is
+   * "src/options/index.html", you would pass "options.html" because that's where it is written to
+   * in the dist directory, and where it's available at in the actual extension.
+   *
+   * @example
+   * server.reloadPage("popup.html")
+   * server.reloadPage("sandbox.html")
+   */
+  reloadPage: (path: string) => void;
+  /**
+   * Tell the extension to restart a content script.
+   *
+   * @param contentScript The manifest definition for a content script
+   */
+  reloadContentScript: (
+    contentScript: Omit<Scripting.RegisteredContentScript, 'id'>,
+  ) => void;
 }
 
 export type TargetBrowser = 'chrome' | 'firefox' | 'safari' | 'edge' | 'opera';
@@ -91,7 +261,6 @@ export interface GenericEntrypoint extends BaseEntrypoint {
     | 'sidepanel'
     | 'devtools'
     | 'unlisted-page'
-    | 'unlisted-page'
     | 'unlisted-script';
 }
 
@@ -139,12 +308,51 @@ export type Entrypoint =
 export type OnContentScriptStopped = (cb: () => void) => void;
 
 export interface ContentScriptDefinition {
-  matches: string[];
-  runAt?: 'document_start' | 'document_end' | 'document_idle';
-  matchAboutBlank?: boolean;
+  matches: Manifest.ContentScript['matches'];
+  /**
+   * See https://developer.chrome.com/docs/extensions/mv3/content_scripts/
+   * @default "documentIdle"
+   */
+  runAt?: Manifest.ContentScript['run_at'];
+  /**
+   * See https://developer.chrome.com/docs/extensions/mv3/content_scripts/
+   * @default false
+   */
+  matchAboutBlank?: Manifest.ContentScript['match_about_blank'];
+  /**
+   * See https://developer.chrome.com/docs/extensions/mv3/content_scripts/
+   * @default []
+   */
+  excludeMatches?: Manifest.ContentScript['exclude_matches'];
+  /**
+   * See https://developer.chrome.com/docs/extensions/mv3/content_scripts/
+   * @default []
+   */
+  includeGlobs?: Manifest.ContentScript['include_globs'];
+  /**
+   * See https://developer.chrome.com/docs/extensions/mv3/content_scripts/
+   * @default []
+   */
+  excludeGlobs?: Manifest.ContentScript['exclude_globs'];
+  /**
+   * See https://developer.chrome.com/docs/extensions/mv3/content_scripts/
+   * @default false
+   */
+  allFrames?: Manifest.ContentScript['all_frames'];
+  /**
+   * See https://developer.chrome.com/docs/extensions/mv3/content_scripts/
+   * @default false
+   */
   matchOriginAsFallback?: boolean;
+  /**
+   * See https://developer.chrome.com/docs/extensions/mv3/content_scripts/
+   * @default "ISOLATED"
+   */
   world?: 'ISOLATED' | 'MAIN';
-  main(onStopped: OnContentScriptStopped): void | Promise<void>;
+  /**
+   * Main function executed when the content script is loaded.
+   */
+  main(): void | Promise<void>;
 }
 
 export interface BackgroundScriptDefintition {
@@ -153,32 +361,46 @@ export interface BackgroundScriptDefintition {
 }
 
 /**
- * Manifest customization available in the `wxt.config.ts` file. Any missing fields like "name"
- * and "version" are managed automatically, and don't need to be listed here.
+ * Manifest customization available in the `wxt.config.ts` file. You cannot configure entrypoints
+ * here, they are configured inline.
  */
-export type UserManifest = Omit<
-  Manifest.WebExtensionManifest,
-  | 'action'
-  | 'background'
-  | 'browser_action'
-  | 'chrome_url_overrides'
-  | 'content_scripts'
-  | 'description'
-  | 'devtools_page'
-  | 'manifest_version'
-  | 'name'
-  | 'options_page'
-  | 'options_ui'
-  | 'sandbox'
-  | 'page_action'
-  | 'popup'
-  | 'short_name'
-  | 'sidepanel'
-  | 'sidebar_action'
-  | 'version'
-  | 'version_name'
+export type UserManifest = Partial<
+  Omit<
+    Manifest.WebExtensionManifest,
+    | 'action'
+    | 'background'
+    | 'browser_action'
+    | 'chrome_url_overrides'
+    | 'content_scripts'
+    | 'devtools_page'
+    | 'manifest_version'
+    | 'options_page'
+    | 'options_ui'
+    | 'sandbox'
+    | 'page_action'
+    | 'popup'
+    | 'sidepanel'
+    | 'sidebar_action'
+  >
 >;
 
+export type UserManifestFn = (
+  env: ConfigEnv,
+) => UserManifest | Promise<UserManifest>;
+
+export interface ConfigEnv {
+  mode: string;
+  command: 'build' | 'serve';
+  /**
+   * Browser passed in from the CLI
+   */
+  browser: TargetBrowser;
+  /**
+   * Manifest version passed in from the CLI
+   */
+  manifestVersion: 2 | 3;
+}
+
 /**
  * Configure how the browser starts up.
  */

src/core/types/internal.ts

@@ -36,6 +36,13 @@ export interface InternalConfig {
   fsCache: FsCache;
   server?: WxtDevServer;
   runnerConfig: ResolvedConfig<ExtensionRunnerConfig>;
+  zip: {
+    name?: string;
+    artifactTemplate: string;
+    sourcesTemplate: string;
+    ignoredSources: string[];
+    sourcesRoot: string;
+  };
 }
 
 export type EntrypointGroup = Entrypoint | Entrypoint[];

src/core/utils/__tests__/arrays.test.ts

@@ -0,0 +1,18 @@
+import { describe, it, expect } from 'vitest';
+import { every } from '../arrays';
+
+describe('Array Utils', () => {
+  describe('every', () => {
+    it('should return true when the array is empty', () => {
+      expect(every([], () => false)).toBe(true);
+    });
+
+    it("should return true when all item predicate's return true", () => {
+      expect(every([1, 1, 1], (item) => item === 1)).toBe(true);
+    });
+
+    it("should return false when a single item predicate's return false", () => {
+      expect(every([1, 2, 1], (item) => item === 1)).toBe(false);
+    });
+  });
+});

src/core/utils/__tests__/content-scripts.test.ts

@@ -0,0 +1,28 @@
+import { describe, expect, it } from 'vitest';
+import { hashContentScriptOptions } from '../content-scripts';
+
+describe('Content Script Utils', () => {
+  describe('hashContentScriptOptions', () => {
+    it('should return a string containing all the options with defaults applied', () => {
+      const hash = hashContentScriptOptions({ matches: [] });
+
+      expect(hash).toMatchInlineSnapshot(
+        '"[[\\"allFrames\\",false],[\\"excludeGlobs\\",[]],[\\"excludeMatches\\",[]],[\\"includeGlobs\\",[]],[\\"matchAboutBlank\\",false],[\\"matches\\",[]],[\\"matchOriginAsFallback\\",false],[\\"runAt\\",\\"document_idle\\"],[\\"world\\",\\"ISOLATED\\"]]"',
+      );
+    });
+
+    it('should be consistent regardless of the object ordering and default values', () => {
+      const hash1 = hashContentScriptOptions({
+        allFrames: true,
+        matches: ['*://google.com/*', '*://duckduckgo.com/*'],
+        matchAboutBlank: false,
+      });
+      const hash2 = hashContentScriptOptions({
+        matches: ['*://duckduckgo.com/*', '*://google.com/*'],
+        allFrames: true,
+      });
+
+      expect(hash1).toBe(hash2);
+    });
+  });
+});

src/core/utils/__tests__/detectDevChanges.test.ts

@@ -0,0 +1,251 @@
+import { describe, expect, it } from 'vitest';
+import { DevModeChange, detectDevChanges } from '../detectDevChanges';
+import {
+  fakeBackgroundEntrypoint,
+  fakeContentScriptEntrypoint,
+  fakeFile,
+  fakeGenericEntrypoint,
+  fakeManifest,
+  fakeOptionsEntrypoint,
+  fakePopupEntrypoint,
+  fakeRollupOutputAsset,
+  fakeRollupOutputChunk,
+} from '../../../testing/fake-objects';
+import { BuildOutput, BuildStepOutput } from '../../types';
+
+describe('Detect Dev Changes', () => {
+  describe('No changes', () => {
+    it("should return 'no-change' when a build hasn't finished", () => {
+      const actual = detectDevChanges(
+        [['unknown', '/path/to/file.ts']],
+        undefined,
+      );
+
+      expect(actual).toEqual({ type: 'no-change' });
+    });
+
+    it("should return 'no-change' when the changed file isn't used by any of the entrypoints", () => {
+      const change: [string, string] = ['unknown', '/some/path.ts'];
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [],
+        steps: [
+          {
+            entrypoints: fakeContentScriptEntrypoint(),
+            chunks: [fakeRollupOutputChunk(), fakeRollupOutputChunk()],
+          },
+          {
+            entrypoints: fakeContentScriptEntrypoint(),
+            chunks: [
+              fakeRollupOutputChunk(),
+              fakeRollupOutputChunk(),
+              fakeRollupOutputChunk(),
+            ],
+          },
+        ],
+      };
+
+      const actual = detectDevChanges([change], currentOutput);
+
+      expect(actual).toEqual({ type: 'no-change' });
+    });
+  });
+
+  describe('Public Assets', () => {
+    it("should return 'extension-reload' without any groups to rebuild when the changed file is a public asset", () => {
+      const change: [string, string] = [
+        'unknown',
+        '/root/src/public/image.svg',
+      ];
+      const asset1 = fakeRollupOutputAsset({
+        fileName: 'image.svg',
+      });
+      const asset2 = fakeRollupOutputAsset({
+        fileName: 'some-other-image.svg',
+      });
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [asset1, asset2],
+        steps: [],
+      };
+      const expected: DevModeChange = {
+        type: 'extension-reload',
+        rebuildGroups: [],
+        cachedOutput: {
+          ...currentOutput,
+          publicAssets: [asset2],
+        },
+      };
+
+      const actual = detectDevChanges([change], currentOutput);
+
+      expect(actual).toEqual(expected);
+    });
+  });
+
+  describe('Background', () => {
+    it("should rebuild the background and reload the extension when the changed file in it's chunks' `moduleIds` field", () => {
+      const changedPath = '/root/utils/shared.ts';
+      const contentScript = fakeContentScriptEntrypoint({
+        inputPath: '/root/overlay.content.ts',
+      });
+      const background = fakeBackgroundEntrypoint({
+        inputPath: '/root/background.ts',
+      });
+
+      const step1: BuildStepOutput = {
+        entrypoints: contentScript,
+        chunks: [
+          fakeRollupOutputChunk({
+            moduleIds: [fakeFile(), fakeFile()],
+          }),
+        ],
+      };
+      const step2: BuildStepOutput = {
+        entrypoints: background,
+        chunks: [
+          fakeRollupOutputChunk({
+            moduleIds: [fakeFile(), changedPath, fakeFile()],
+          }),
+        ],
+      };
+
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [],
+        steps: [step1, step2],
+      };
+      const expected: DevModeChange = {
+        type: 'extension-reload',
+        cachedOutput: {
+          ...currentOutput,
+          steps: [step1],
+        },
+        rebuildGroups: [background],
+      };
+
+      const actual = detectDevChanges(
+        [['unknown', changedPath]],
+        currentOutput,
+      );
+
+      expect(actual).toEqual(expected);
+    });
+  });
+
+  describe('HTML Pages', () => {
+    it('should rebuild then reload only the effected pages', async () => {
+      const changedPath = '/root/page1/index.html';
+      const htmlPage1 = fakePopupEntrypoint({
+        inputPath: changedPath,
+      });
+      const htmlPage2 = fakeOptionsEntrypoint({
+        inputPath: '/root/page2.html',
+      });
+      const htmlPage3 = fakeGenericEntrypoint({
+        type: 'sandbox',
+        inputPath: '/root/page3.html',
+      });
+
+      const step1: BuildStepOutput = {
+        entrypoints: [htmlPage1, htmlPage2],
+        chunks: [
+          fakeRollupOutputChunk({
+            moduleIds: [fakeFile(), changedPath],
+          }),
+        ],
+      };
+      const step2: BuildStepOutput = {
+        entrypoints: [htmlPage3],
+        chunks: [
+          fakeRollupOutputChunk({
+            moduleIds: [fakeFile(), fakeFile(), fakeFile()],
+          }),
+        ],
+      };
+
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [],
+        steps: [step1, step2],
+      };
+      const expected: DevModeChange = {
+        type: 'html-reload',
+        cachedOutput: {
+          ...currentOutput,
+          steps: [step2],
+        },
+        rebuildGroups: [[htmlPage1, htmlPage2]],
+      };
+
+      const actual = detectDevChanges(
+        [['unknown', changedPath]],
+        currentOutput,
+      );
+
+      expect(actual).toEqual(expected);
+    });
+  });
+
+  describe('Content Scripts', () => {
+    it('should rebuild then reload only the effected content scripts', async () => {
+      const changedPath = '/root/utils/shared.ts';
+      const script1 = fakeContentScriptEntrypoint({
+        inputPath: '/root/overlay1.content/index.ts',
+      });
+      const script2 = fakeContentScriptEntrypoint({
+        inputPath: '/root/overlay2.ts',
+      });
+      const script3 = fakeContentScriptEntrypoint({
+        inputPath: '/root/overlay3.content/index.ts',
+      });
+
+      const step1: BuildStepOutput = {
+        entrypoints: script1,
+        chunks: [
+          fakeRollupOutputChunk({
+            moduleIds: [fakeFile(), changedPath],
+          }),
+        ],
+      };
+      const step2: BuildStepOutput = {
+        entrypoints: script2,
+        chunks: [
+          fakeRollupOutputChunk({
+            moduleIds: [fakeFile(), fakeFile(), fakeFile()],
+          }),
+        ],
+      };
+      const step3: BuildStepOutput = {
+        entrypoints: script3,
+        chunks: [
+          fakeRollupOutputChunk({
+            moduleIds: [changedPath, fakeFile(), fakeFile()],
+          }),
+        ],
+      };
+
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [],
+        steps: [step1, step2, step3],
+      };
+      const expected: DevModeChange = {
+        type: 'content-script-reload',
+        cachedOutput: {
+          ...currentOutput,
+          steps: [step2],
+        },
+        changedSteps: [step1, step3],
+        rebuildGroups: [script1, script3],
+      };
+
+      const actual = detectDevChanges(
+        [['unknown', changedPath]],
+        currentOutput,
+      );
+
+      expect(actual).toEqual(expected);
+    });
+  });
+});

src/core/utils/__tests__/strings.test.ts

@@ -0,0 +1,45 @@
+import { describe, expect, it } from 'vitest';
+import { kebabCaseAlphanumeric, removeImportStatements } from '../strings';
+
+describe('String utils', () => {
+  describe('kebabCaseAlphanumeric', () => {
+    it.each([
+      ['HELLO', 'hello'],
+      ['Hello, World!', 'hello-world'],
+      ['hello123', 'hello123'],
+      ['Hello World This Is A Test', 'hello-world-this-is-a-test'],
+      ['Hello     World', 'hello-world'],
+      ['hello-world', 'hello-world'], // Ensure hyphens are preserved
+    ])('should convert "%s" to "%s"', (input, expected) => {
+      expect(kebabCaseAlphanumeric(input)).toBe(expected);
+    });
+  });
+
+  describe('removeImportStatements', () => {
+    it('should remove all import formats', () => {
+      const imports = `
+import { registerGithubService, createGithubApi } from "@/utils/github";
+import {
+  registerGithubService,
+  createGithubApi
+} from "@/utils/github";
+import{ registerGithubService, createGithubApi }from "@/utils/github";
+import GitHub from "@/utils/github";
+import "@/utils/github";
+import '@/utils/github';
+import"@/utils/github" 
+ import'@/utils/github';
+    `;
+      expect(removeImportStatements(imports).trim()).toEqual('');
+    });
+
+    it('should not remove import.meta or inline import statements', () => {
+      const imports = `
+import.meta.env.DEV
+const a = await import("example");
+import("example");
+    `;
+      expect(removeImportStatements(imports)).toEqual(imports);
+    });
+  });
+});

src/core/utils/arrays.ts

@@ -0,0 +1,11 @@
+/**
+ * Checks if `predicate` returns truthy for all elements of the array.
+ */
+export function every<T>(
+  array: T[],
+  predicate: (item: T, index: number) => boolean,
+): boolean {
+  for (let i = 0; i < array.length; i++)
+    if (!predicate(array[i], i)) return false;
+  return true;
+}

src/core/utils/auto-imports.ts

@@ -7,13 +7,10 @@ export function getUnimportOptions(
 ): Partial<UnimportOptions> {
   const defaultOptions: Partial<UnimportOptions> = {
     debugLog: config.logger.debug,
-    imports: [
-      { name: '*', as: 'browser', from: 'webextension-polyfill' },
-      { name: 'defineConfig', from: 'wxt' },
-    ],
-    presets: [{ package: 'wxt/client' }],
+    imports: [{ name: 'defineConfig', from: 'wxt' }],
+    presets: [{ package: 'wxt/client' }, { package: 'wxt/browser' }],
     warn: config.logger.warn,
-    dirs: ['components', 'composables', 'hooks', 'utils'],
+    dirs: ['./components/*', './composables/*', './hooks/*', './utils/*'],
   };
 
   return mergeConfig(

src/core/utils/content-scripts.ts

@@ -0,0 +1,52 @@
+import { Manifest } from 'webextension-polyfill';
+import { ContentScriptEntrypoint } from '../types';
+
+/**
+ * Returns a unique and consistent string hash based on a content scripts options.
+ *
+ * It is able to recognize default values,
+ */
+export function hashContentScriptOptions(
+  options: ContentScriptEntrypoint['options'],
+): string {
+  const withDefaults: ContentScriptEntrypoint['options'] = {
+    excludeGlobs: [],
+    excludeMatches: [],
+    includeGlobs: [],
+    matchAboutBlank: false,
+    matchOriginAsFallback: false,
+    runAt: 'document_idle',
+    allFrames: false,
+    world: 'ISOLATED',
+    // TODO: strip undefined fields from options object to improve content script grouping.
+    ...options,
+  };
+  return JSON.stringify(
+    Object.entries(withDefaults)
+      // Sort any arrays so their values are consistent
+      .map<[string, unknown]>(([key, value]) => {
+        if (Array.isArray(value)) return [key, value.sort()];
+        else return [key, value];
+      })
+      // Sort all the fields alphabetically
+      .sort((l, r) => l[0].localeCompare(r[0])),
+  );
+}
+
+export function mapWxtOptionsToContentScript(
+  options: ContentScriptEntrypoint['options'],
+): Omit<Manifest.ContentScript, 'js' | 'css'> {
+  return {
+    matches: options.matches,
+    all_frames: options.allFrames,
+    match_about_blank: options.matchAboutBlank,
+    exclude_globs: options.excludeGlobs,
+    exclude_matches: options.excludeMatches,
+    include_globs: options.includeGlobs,
+    run_at: options.runAt,
+
+    // @ts-expect-error: untyped chrome options
+    match_origin_as_fallback: options.matchOriginAsFallback,
+    world: options.world,
+  };
+}

src/core/utils/detectDevChanges.ts

@@ -0,0 +1,179 @@
+import { BuildOutput, BuildStepOutput, EntrypointGroup } from '../types';
+import * as vite from 'vite';
+import { every } from './arrays';
+import { normalizePath } from './paths';
+
+/**
+ * Compare the changed files vs the build output and determine what kind of reload needs to happen:
+ *
+ * - Do nothing
+ *   - CSS or JS file associated with an HTML page is changed - this is handled automatically by the
+ *     dev server
+ *   - Change isn't used by any of the entrypoints
+ * - Reload Content script
+ *   - CSS or JS file associated with a content script
+ *   - Background script will be told to reload the content script
+ * - Reload HTML file
+ *   - HTML file itself is saved - HMR doesn't handle this because the HTML pages are pre-rendered
+ *   - Chrome is OK reloading the page when the HTML file is changed without reloading the whole
+ *     extension. Not sure about firefox, this might need to change to an extension reload
+ * - Reload extension
+ *   - Background script is changed
+ *   - Manifest is different
+ * - Restart browser
+ *   - Config file changed (wxt.config.ts, .env, web-ext.config.ts, etc)
+ */
+export function detectDevChanges(
+  changedFiles: [event: string, path: string][],
+  currentOutput: BuildOutput | undefined,
+): DevModeChange {
+  if (currentOutput == null) return { type: 'no-change' };
+
+  const changedSteps = new Set(
+    changedFiles.flatMap((changedFile) =>
+      findEffectedSteps(changedFile, currentOutput),
+    ),
+  );
+  if (changedSteps.size === 0) return { type: 'no-change' };
+
+  const unchangedOutput: BuildOutput = {
+    manifest: currentOutput.manifest,
+    steps: [],
+    publicAssets: [],
+  };
+  const changedOutput: BuildOutput = {
+    manifest: currentOutput.manifest,
+    steps: [],
+    publicAssets: [],
+  };
+
+  for (const step of currentOutput.steps) {
+    if (changedSteps.has(step)) {
+      changedOutput.steps.push(step);
+    } else {
+      unchangedOutput.steps.push(step);
+    }
+  }
+  for (const asset of currentOutput.publicAssets) {
+    if (changedSteps.has(asset)) {
+      changedOutput.publicAssets.push(asset);
+    } else {
+      unchangedOutput.publicAssets.push(asset);
+    }
+  }
+
+  const isOnlyHtmlChanges =
+    changedFiles.length > 0 &&
+    every(changedFiles, ([_, file]) => file.endsWith('.html'));
+  if (isOnlyHtmlChanges) {
+    return {
+      type: 'html-reload',
+      cachedOutput: unchangedOutput,
+      rebuildGroups: changedOutput.steps.map((step) => step.entrypoints),
+    };
+  }
+
+  const isOnlyContentScripts =
+    changedOutput.steps.length > 0 &&
+    every(
+      changedOutput.steps.flatMap((step) => step.entrypoints),
+      (entry) => entry.type === 'content-script',
+    );
+  if (isOnlyContentScripts) {
+    return {
+      type: 'content-script-reload',
+      cachedOutput: unchangedOutput,
+      changedSteps: changedOutput.steps,
+      rebuildGroups: changedOutput.steps.map((step) => step.entrypoints),
+    };
+  }
+
+  return {
+    type: 'extension-reload',
+    cachedOutput: unchangedOutput,
+    rebuildGroups: changedOutput.steps.map((step) => step.entrypoints),
+  };
+}
+
+/**
+ * For a single change, return all the step of the build output that were effected by it.
+ */
+function findEffectedSteps(
+  changedFile: [event: string, path: string],
+  currentOutput: BuildOutput,
+): DetectedChange[] {
+  const changes: DetectedChange[] = [];
+  const changedPath = normalizePath(changedFile[1]);
+
+  const isChunkEffected = (
+    chunk: vite.Rollup.OutputChunk | vite.Rollup.OutputAsset,
+  ): boolean =>
+    // If it's an HTML file with the same path, is is effected because HTML files need to be pre-rendered
+    // fileName is normalized, relative bundle path
+    (chunk.type === 'asset' && changedPath.endsWith(chunk.fileName)) ||
+    // If it's a chunk that depends on the changed file, it is effected
+    // moduleIds are absolute, normalized paths
+    (chunk.type === 'chunk' && chunk.moduleIds.includes(changedPath));
+
+  for (const step of currentOutput.steps) {
+    const effectedChunk = step.chunks.find((chunk) => isChunkEffected(chunk));
+    if (effectedChunk) changes.push(step);
+  }
+
+  const effectedAsset = currentOutput.publicAssets.find((chunk) =>
+    isChunkEffected(chunk),
+  );
+  if (effectedAsset) changes.push(effectedAsset);
+
+  return changes;
+}
+
+/**
+ * Contains information about what files changed, what needs rebuilt, and the type of reload that is
+ * required.
+ */
+export type DevModeChange =
+  | NoChange
+  | HtmlReload
+  | ExtensionReload
+  | ContentScriptReload;
+// | BrowserRestart
+
+interface NoChange {
+  type: 'no-change';
+}
+
+interface RebuildChange {
+  /**
+   * The list of entrypoints that need rebuilt.
+   */
+  rebuildGroups: EntrypointGroup[];
+  /**
+   * The previous output stripped of any files are going to change.
+   */
+  cachedOutput: BuildOutput;
+}
+
+interface HtmlReload extends RebuildChange {
+  type: 'html-reload';
+}
+
+interface ExtensionReload extends RebuildChange {
+  type: 'extension-reload';
+}
+
+// interface BrowserRestart extends RebuildChange {
+//   type: 'browser-restart';
+// }
+
+interface ContentScriptReload extends RebuildChange {
+  type: 'content-script-reload';
+  changedSteps: BuildStepOutput[];
+}
+
+/**
+ * When figuring out what needs reloaded, this stores the step that was changed, or the public
+ * directory asset that was changed. It doesn't know what type of change is required yet. Just an
+ * intermediate type.
+ */
+type DetectedChange = BuildStepOutput | vite.Rollup.OutputAsset;

src/core/utils/entrypoints.ts

@@ -1,5 +1,6 @@
 import { Entrypoint } from '../types';
 import path, { relative, resolve } from 'node:path';
+import { normalizePath } from './paths';
 
 export function getEntrypointName(
   entrypointsDir: string,
@@ -7,8 +8,8 @@ export function getEntrypointName(
   // type: Entrypoint['type'],
 ): string {
   const relativePath = path.relative(entrypointsDir, inputPath);
-  // Grab the string up to the first . or /
-  const name = relativePath.split(/[\.\/]/, 2)[0];
+  // Grab the string up to the first . or / or \\
+  const name = relativePath.split(/[\.\/\\]/, 2)[0];
 
   return name;
 }
@@ -29,5 +30,7 @@ export function getEntrypointBundlePath(
   outDir: string,
   ext: string,
 ): string {
-  return relative(outDir, getEntrypointOutputFile(entrypoint, ext));
+  return normalizePath(
+    relative(outDir, getEntrypointOutputFile(entrypoint, ext)),
+  );
 }

src/core/utils/findOpenPort.ts

@@ -1,33 +0,0 @@
-import net from 'node:net';
-
-/**
- * Finds the first open port in a range of ports.
- */
-export function findOpenPort(
-  startPort: number,
-  endPort: number,
-): Promise<number> {
-  return findOpenPortRecursive(startPort, startPort, endPort);
-}
-
-function findOpenPortRecursive(
-  port: number,
-  startPort: number,
-  endPort: number,
-): Promise<number> {
-  return new Promise((resolve, reject) => {
-    if (port > endPort)
-      return reject(
-        Error(`Could not find open port between ${startPort}-${endPort}`),
-      );
-    const server = net.createServer();
-
-    server.listen(port, () => {
-      server.once('close', () => resolve(port));
-      server.close();
-    });
-    server.on('error', () =>
-      resolve(findOpenPortRecursive(port + 1, startPort, endPort)),
-    );
-  });
-}

src/core/utils/getInternalConfig.ts

@@ -1,13 +1,15 @@
 import {
+  ConfigEnv,
   ExtensionRunnerConfig,
   InlineConfig,
   InternalConfig,
   UserConfig,
+  UserManifest,
+  UserManifestFn,
 } from '../types';
 import path, { resolve } from 'node:path';
 import * as vite from 'vite';
 import { consola } from 'consola';
-import { importTsFile } from './importTsFile';
 import * as plugins from '../vite-plugins';
 import { createFsCache } from './createFsCache';
 import { getGlobals } from './globals';
@@ -43,7 +45,6 @@ export async function getInternalConfig(
     command,
     logger,
     vite: config.vite ?? {},
-    manifest: config.manifest ?? {},
     imports: config.imports ?? {},
     runnerConfig: await loadConfig<ExtensionRunnerConfig>({
       name: 'web-ext',
@@ -59,10 +60,12 @@ export async function getInternalConfig(
     mode,
   };
   if (config.configFile !== false) {
-    userConfig = await importTsFile<UserConfig>(
-      root,
-      path.resolve(root, config.configFile ?? 'wxt.config.ts'),
-    );
+    const loaded = await loadConfig<UserConfig>({
+      name: 'wxt',
+      cwd: root,
+      rcFile: false,
+    });
+    userConfig = loaded.config ?? {};
   }
 
   // Merge inline and user configs
@@ -77,10 +80,16 @@ export async function getInternalConfig(
     srcDir,
     userConfig.entrypointsDir ?? 'entrypoints',
   );
-  const publicDir = resolve(srcDir, userConfig.publicDir ?? 'public');
+  const publicDir = resolve(root, userConfig.publicDir ?? 'public');
   const wxtDir = resolve(srcDir, '.wxt');
   const typesDir = resolve(wxtDir, 'types');
 
+  // Merge manifest sources
+  const env: ConfigEnv = { mode, browser, manifestVersion, command };
+  const userManifest = await resolveManifestConfig(env, userConfig.manifest);
+  const inlineManifest = await resolveManifestConfig(env, config.manifest);
+  const manifest = vite.mergeConfig(userManifest, inlineManifest);
+
   const finalConfig: InternalConfig = {
     ...merged,
     srcDir,
@@ -89,12 +98,33 @@ export async function getInternalConfig(
     wxtDir: wxtDir,
     typesDir,
     fsCache: createFsCache(wxtDir),
+    manifest,
+    zip: {
+      sourcesTemplate: '{{name}}-{{version}}-sources.zip',
+      artifactTemplate: '{{name}}-{{version}}-{{browser}}.zip',
+      sourcesRoot: root,
+      ...userConfig.zip,
+      ...config.zip,
+      ignoredSources: [
+        '**/node_modules',
+        // WXT files
+        '**/web-ext.config.ts',
+        // Hidden files
+        '**/.*',
+        // Tests
+        '**/__tests__/**',
+        '**/*.+(test|spec).?(c|m)+(j|t)s?(x)',
+        // User config
+        ...(userConfig.zip?.ignoredSources ?? []),
+        ...(config.zip?.ignoredSources ?? []),
+      ],
+    },
   };
 
   // Customize the default vite config
   finalConfig.vite.root = root;
   finalConfig.vite.configFile = false;
-  finalConfig.vite.logLevel = 'silent';
+  finalConfig.vite.logLevel = 'warn';
 
   finalConfig.vite.build ??= {};
   finalConfig.vite.build.outDir = outDir;
@@ -110,6 +140,9 @@ export async function getInternalConfig(
   finalConfig.vite.plugins.push(
     plugins.virtualEntrypoin('content-script', finalConfig),
   );
+  finalConfig.vite.plugins.push(plugins.devServerGlobals(finalConfig));
+  finalConfig.vite.plugins.push(plugins.tsconfigPaths(finalConfig));
+  finalConfig.vite.plugins.push(plugins.noopBackground());
 
   finalConfig.vite.define ??= {};
   getGlobals(finalConfig).forEach((global) => {
@@ -125,5 +158,21 @@ export async function getInternalConfig(
  */
 type InternalConfigNoUserDirs = Omit<
   InternalConfig,
-  'srcDir' | 'publicDir' | 'entrypointsDir' | 'wxtDir' | 'typesDir' | 'fsCache'
+  | 'srcDir'
+  | 'publicDir'
+  | 'entrypointsDir'
+  | 'wxtDir'
+  | 'typesDir'
+  | 'fsCache'
+  | 'manifest'
+  | 'zip'
 >;
+
+async function resolveManifestConfig(
+  env: ConfigEnv,
+  manifest: UserManifest | Promise<UserManifest> | UserManifestFn | undefined,
+): Promise<UserManifest> {
+  return await (typeof manifest === 'function'
+    ? manifest(env)
+    : manifest ?? {});
+}

src/core/utils/globals.ts

@@ -12,7 +12,7 @@ export function getGlobals(
     {
       name: '__BROWSER__',
       value: config.browser,
-      type: `"chromium" | "firefox"`,
+      type: `string`,
     },
     {
       name: '__IS_CHROME__',
@@ -39,5 +39,10 @@ export function getGlobals(
       value: config.browser === 'opera',
       type: `boolean`,
     },
+    {
+      name: '__COMMAND__',
+      value: config.command,
+      type: `"build" | "serve"`,
+    },
   ];
 }

src/core/utils/importTsFile.ts

@@ -1,44 +1,71 @@
-import { consola } from 'consola';
 import createJITI from 'jiti';
-import transform from 'jiti/dist/babel';
+import { InternalConfig } from '../types';
+import { createUnimport } from 'unimport';
+import fs from 'fs-extra';
 import { resolve } from 'path';
-import { scanExports } from 'unimport';
+import transform from 'jiti/dist/babel';
+import { getUnimportOptions } from './auto-imports';
+import { removeImportStatements } from './strings';
+import { normalizePath } from './paths';
 
-export async function importTsFile<T>(root: string, path: string): Promise<T> {
-  const clientImports = await scanExports(
-    resolve(root, 'node_modules/wxt/dist/client/index.js'),
+/**
+ * Get the value from the default export of a `path`.
+ *
+ * It works by:
+ *
+ * 1. Reading the file text
+ * 2. Stripping all imports from it via regex
+ * 3. Auto-import only the client helper functions
+ *
+ * This prevents resolving imports of imports, speeding things up and preventing "xxx is not
+ * defined" errors.
+ *
+ * Downside is that code cannot be executed outside of the main fucntion for the entrypoint,
+ * otherwise you will see "xxx is not defined" errors for any imports used outside of main function.
+ */
+export async function importTsFile<T>(
+  path: string,
+  config: InternalConfig,
+): Promise<T> {
+  config.logger.debug('Loading file metadata:', path);
+  // JITI & Babel uses normalized paths.
+  const normalPath = normalizePath(path);
+
+  const unimport = createUnimport({
+    ...getUnimportOptions(config),
+    // Only allow specific imports, not all from the project
+    dirs: [],
+  });
+  await unimport.init();
+
+  const text = await fs.readFile(path, 'utf-8');
+  const textNoImports = removeImportStatements(text);
+  const { code } = await unimport.injectImports(textNoImports);
+  config.logger.debug(
+    ['Text:', text, 'No imports:', textNoImports, 'Code:', code].join('\n'),
   );
+
   const jiti = createJITI(__filename, {
     cache: false,
     esmResolve: true,
     interopDefault: true,
-
+    alias: {
+      'webextension-polyfill': resolve(
+        config.root,
+        'node_modules/wxt/dist/virtual-modules/fake-browser.js',
+      ),
+    },
     transform(opts) {
-      // Remove CSS imports from the source code - Jiti can't handle them.
-      opts.source = opts.source.replace(/^import ['"].*\.css['"];?$/gm, '');
-      opts.source = opts.source.replace(
-        /^import\s+.*\s+from ['"]webextension-polyfill['"];?$/gm,
-        '',
-      );
-
-      // Append any wxt/client functions so babel doesn't complain about undefined variables
-      if (opts.filename === path) {
-        // TODO: Only append import if it isn't already imported
-        const imports =
-          clientImports
-            .map((i) => `import { ${i.name} } from "${i.from}";`)
-            .join('\n') + '\n';
-        opts.source = imports + opts.source;
-      }
-
-      // Call the default babel transformer with our modified source code
-      return transform(opts);
+      if (opts.filename === normalPath)
+        return transform({ ...opts, source: code });
+      else return transform(opts);
     },
   });
+
   try {
     return await jiti(path);
   } catch (err) {
-    consola.error(`Failed to import file: ${path}`);
+    config.logger.error(err);
     throw err;
   }
 }

src/core/utils/manifest.ts

@@ -12,6 +12,11 @@ import fs from 'fs-extra';
 import { resolve } from 'path';
 import { getEntrypointBundlePath } from './entrypoints';
 import { ContentSecurityPolicy } from './ContentSecurityPolicy';
+import {
+  hashContentScriptOptions,
+  mapWxtOptionsToContentScript,
+} from './content-scripts';
+import { getPackageJson } from './package';
 
 /**
  * Writes the manifest to the output directory and the build output.
@@ -29,7 +34,7 @@ export async function writeManifest(
   await fs.ensureDir(config.outDir);
   await fs.writeFile(resolve(config.outDir, 'manifest.json'), str, 'utf-8');
 
-  output.unshift({
+  output.publicAssets.unshift({
     type: 'asset',
     fileName: 'manifest.json',
     name: 'manifest',
@@ -43,48 +48,53 @@ export async function writeManifest(
  */
 export async function generateMainfest(
   entrypoints: Entrypoint[],
-  buildOutput: BuildOutput,
+  buildOutput: Omit<BuildOutput, 'manifest'>,
   config: InternalConfig,
 ): Promise<Manifest.WebExtensionManifest> {
   const pkg = await getPackageJson(config);
-  if (pkg.version == null)
-    throw Error('package.json does not include a version');
-  if (pkg.name == null) throw Error('package.json does not include a name');
-  if (pkg.description == null)
-    throw Error('package.json does not include a description');
 
-  const manifest: Manifest.WebExtensionManifest = {
-    manifest_version: config.manifestVersion,
-    name: pkg.name,
-    short_name: pkg.shortName,
-    version: simplifyVersion(pkg.version),
-    version_name: config.browser === 'firefox' ? undefined : pkg.version,
-    ...config.manifest,
-  };
+  const manifest: Manifest.WebExtensionManifest = Object.assign(
+    {
+      manifest_version: config.manifestVersion,
+      name: pkg?.name,
+      description: pkg?.description,
+      version: pkg?.version && simplifyVersion(pkg.version),
+      // Only add the version name to chromium and if the user hasn't specified a custom version.
+      version_name:
+        config.browser !== 'firefox' && !config.manifest.version
+          ? pkg?.version
+          : undefined,
+      short_name: pkg?.shortName,
+    },
+    config.manifest,
+  );
 
   addEntrypoints(manifest, entrypoints, buildOutput, config);
 
   if (config.command === 'serve') addDevModeCsp(manifest, config);
+  if (config.command === 'serve') addDevModePermissions(manifest, config);
+
+  // TODO: transform manifest here.
+
+  if (manifest.name == null)
+    throw Error(
+      "Manifest 'name' is missing. Either:\n1. Set the name in your <root>/package.json\n2. Set a name via the manifest option in your wxt.config.ts",
+    );
+  if (manifest.version == null) {
+    throw Error(
+      "Manifest 'version' is missing. Either:\n1. Add a version in your <root>/package.json\n2. Pass the version via the manifest option in your wxt.config.ts",
+    );
+  }
 
   return manifest;
 }
 
-/**
- * Read the package.json from the current directory.
- *
- * TODO: look in root and up directories until it's found
- */
-async function getPackageJson(config: InternalConfig): Promise<any> {
-  return await fs.readJson(resolve(config.root, 'package.json'));
-}
-
 /**
  * Removes suffixes from the version, like X.Y.Z-alpha1 (which brosers don't allow), so it's a
  * simple version number, like X or X.Y or X.Y.Z, which browsers allow.
  */
 function simplifyVersion(versionName: string): string {
   // Regex adapted from here: https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/version#version_format
-
   const version = /^((0|[1-9][0-9]{0,8})([.](0|[1-9][0-9]{0,8})){0,3}).*$/.exec(
     versionName,
   )?.[1];
@@ -100,7 +110,7 @@ function simplifyVersion(versionName: string): string {
 function addEntrypoints(
   manifest: Manifest.WebExtensionManifest,
   entrypoints: Entrypoint[],
-  buildOutput: BuildOutput,
+  buildOutput: Omit<BuildOutput, 'manifest'>,
   config: InternalConfig,
 ): void {
   const entriesByType = entrypoints.reduce<
@@ -270,30 +280,29 @@ function addEntrypoints(
   }
 
   if (contentScripts?.length) {
-    if (config.command === 'serve') {
-      const permissionsKey =
-        config.manifestVersion === 2 ? 'permissions' : 'host_permissions';
-      const hostPermissions = new Set<string>(manifest[permissionsKey] ?? []);
+    // Don't add content scripts to the manifest in dev mode for MV3 - they're managed and reloaded
+    // at runtime
+    if (config.command === 'serve' && config.manifestVersion === 3) {
+      const hostPermissions = new Set<string>(manifest.host_permissions ?? []);
       contentScripts.forEach((script) => {
         script.options.matches.forEach((matchPattern) => {
           hostPermissions.add(matchPattern);
         });
       });
-      manifest[permissionsKey] = Array.from(hostPermissions).sort();
+      hostPermissions.forEach((permission) =>
+        addHostPermission(manifest, permission),
+      );
     } else {
       const hashToEntrypointsMap = contentScripts.reduce((map, script) => {
-        const hash = JSON.stringify(script.options);
-        if (!map.has(hash)) {
-          map.set(hash, [script]);
-        } else {
-          map.get(hash)?.push(script);
-        }
+        const hash = hashContentScriptOptions(script.options);
+        if (map.has(hash)) map.get(hash)?.push(script);
+        else map.set(hash, [script]);
         return map;
       }, new Map<string, ContentScriptEntrypoint[]>());
 
       manifest.content_scripts = Array.from(hashToEntrypointsMap.entries()).map(
         ([, scripts]) => ({
-          ...scripts[0].options,
+          ...mapWxtOptionsToContentScript(scripts[0].options),
           // TOOD: Sorting css and js arrays here so we get consistent test results... but we
           // shouldn't have to. Where is the inconsistency coming from?
           css: getContentScriptCssFiles(scripts, buildOutput)?.sort(),
@@ -316,13 +325,9 @@ function addDevModeCsp(
   const allowedCsp = config.server?.origin ?? 'http://localhost:*';
 
   if (manifest.manifest_version === 3) {
-    manifest.host_permissions ??= [];
-    if (!manifest.host_permissions.includes(permission))
-      manifest.host_permissions.push(permission);
+    addHostPermission(manifest, permission);
   } else {
-    manifest.permissions ??= [];
-    if (!manifest.permissions.includes(permission))
-      manifest.permissions.push(permission);
+    addPermission(manifest, permission);
   }
 
   const csp = new ContentSecurityPolicy(
@@ -345,20 +350,33 @@ function addDevModeCsp(
   }
 }
 
+function addDevModePermissions(
+  manifest: Manifest.WebExtensionManifest,
+  config: InternalConfig,
+) {
+  // For reloading the page
+  addPermission(manifest, 'tabs');
+
+  // For registering content scripts
+  if (config.manifestVersion === 3) addPermission(manifest, 'scripting');
+}
+
 /**
  * Returns the bundle paths to CSS files associated with a list of content scripts, or undefined if
  * there is no associated CSS.
  */
-function getContentScriptCssFiles(
+export function getContentScriptCssFiles(
   contentScripts: ContentScriptEntrypoint[],
-  buildOutput: BuildOutput,
+  buildOutput: Omit<BuildOutput, 'manifest'>,
 ): string[] | undefined {
   const css: string[] = [];
 
+  const allChunks = buildOutput.steps.flatMap((step) => step.chunks);
+
   contentScripts.forEach((script) => {
-    const cssRegex = new RegExp(`^assets/${script.name}-[a-f0-9]{8}.css$`);
-    const relatedCss = buildOutput.find((chunk) =>
-      chunk.fileName.match(cssRegex),
+    // TODO: optimize and remove loop with a map
+    const relatedCss = allChunks.find(
+      (chunk) => chunk.fileName === `assets/${script.name}.css`,
     );
     if (relatedCss) css.push(relatedCss.fileName);
   });
@@ -366,3 +384,21 @@ function getContentScriptCssFiles(
   if (css.length > 0) return css;
   return undefined;
 }
+
+function addPermission(
+  manifest: Manifest.WebExtensionManifest,
+  permission: string,
+): void {
+  manifest.permissions ??= [];
+  if (manifest.permissions.includes(permission)) return;
+  manifest.permissions.push(permission);
+}
+
+function addHostPermission(
+  manifest: Manifest.WebExtensionManifest,
+  hostPermission: string,
+): void {
+  manifest.host_permissions ??= [];
+  if (manifest.host_permissions.includes(hostPermission)) return;
+  manifest.host_permissions.push(hostPermission);
+}

src/core/utils/package.ts

@@ -0,0 +1,22 @@
+import { resolve } from 'node:path';
+import { InternalConfig } from '../types';
+import fs from 'fs-extra';
+
+/**
+ * Read the project's package.json.
+ *
+ * TODO: look in root and up directories until it's found
+ */
+export async function getPackageJson(
+  config: InternalConfig,
+): Promise<Partial<Record<string, any>> | undefined> {
+  const file = resolve(config.root, 'package.json');
+  try {
+    return await fs.readJson(file);
+  } catch (err) {
+    config.logger.debug(
+      `Failed to read package.json at: ${file}. Returning undefined.`,
+    );
+    return {};
+  }
+}

src/core/utils/paths.ts

@@ -0,0 +1,17 @@
+import nodePath from 'node:path';
+import * as vite from 'vite';
+
+/**
+ * Converts system paths to normalized bundler path. On windows and unix, this returns paths with /
+ * instead of \.
+ */
+export function normalizePath(path: string): string {
+  return vite.normalizePath(path);
+}
+
+/**
+ * Given a normalized path, convert it to the system path style. On Windows, switch to \, otherwise use /.
+ */
+export function unnormalizePath(path: string): string {
+  return nodePath.normalize(path);
+}

src/core/utils/public.ts

@@ -0,0 +1,17 @@
+import { InternalConfig } from '../types';
+import fs from 'fs-extra';
+import glob from 'fast-glob';
+import { unnormalizePath } from './paths';
+
+/**
+ * Get all the files in the project's public directory. Returned paths are relative to the
+ * `config.publicDir`.
+ */
+export async function getPublicFiles(
+  config: InternalConfig,
+): Promise<string[]> {
+  if (!(await fs.exists(config.publicDir))) return [];
+
+  const files = await glob('**/*', { cwd: config.publicDir });
+  return files.map(unnormalizePath);
+}

src/core/utils/strings.ts

@@ -0,0 +1,17 @@
+export function kebabCaseAlphanumeric(str: string): string {
+  return str
+    .toLowerCase()
+    .replace(/[^a-z0-9-\s]/g, '') // Remove all non-alphanumeric, non-hyphen characters
+    .replace(/\s+/g, '-'); // Replace spaces with hyphens
+}
+
+/**
+ * Removes import statements from the top of a file. Keeps import.meta and inline, async `import()`
+ * calls.
+ */
+export function removeImportStatements(text: string): string {
+  return text.replace(
+    /(import\s?[{\w][\s\S]*?from\s?["'][\s\S]*?["'];?|import\s?["'][\s\S]*?["'];?)/gm,
+    '',
+  );
+}