chore(release): v0.16.2

BREAKING CHANGE: The build output has changed slightly. This isn't a huge deal, and no steps are required for users unless you're doing something weird with the output files after a build.

Before:

```
.output/
  <target>/
    chunks/
      popup-<hash>.js
    popup.html
```

After:

```
.output/
  <target>/
    popup.html
    popup.js
```

This applies for all HTML files, not just the popup.

CHANGELOG.md

@@ -1,5 +1,92 @@
 # Changelog
 
+## v0.16.2
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.16.1...v0.16.2)
+
+### 🩹 Fixes
+
+- Don't crash background service worker when using `import.meta.url` ([#402](https://github.com/wxt-dev/wxt/pull/402))
+
+## v0.16.1
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.16.0...v0.16.1)
+
+### 🩹 Fixes
+
+- Don't require config to run `wxt submit init` ([9318346](https://github.com/wxt-dev/wxt/commit/9318346))
+
+### 📖 Documentation
+
+- Add premid extension to homepage ([#399](https://github.com/wxt-dev/wxt/pull/399))
+
+### 🏡 Chore
+
+- **templates:** Upgrade to wxt `^0.16.0` ([f0b2a12](https://github.com/wxt-dev/wxt/commit/f0b2a12))
+
+### ❤️ Contributors
+
+- Florian Metz ([@Timeraa](http://github.com/Timeraa))
+
+## v0.16.0
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.4...v0.16.0)
+
+### 🚀 Enhancements
+
+- ⚠️  ESM background support ([#398](https://github.com/wxt-dev/wxt/pull/398))
+
+### 📖 Documentation
+
+- Document how to opt into ESM ([1e12ce2](https://github.com/wxt-dev/wxt/commit/1e12ce2))
+
+### 🏡 Chore
+
+- **deps-dev:** Bump lint-staged from 15.2.0 to 15.2.1 ([#395](https://github.com/wxt-dev/wxt/pull/395))
+- **deps-dev:** Bump p-map from 7.0.0 to 7.0.1 ([#396](https://github.com/wxt-dev/wxt/pull/396))
+- **deps-dev:** Bump @vitest/coverage-v8 from 1.0.1 to 1.2.2 ([#397](https://github.com/wxt-dev/wxt/pull/397))
+
+#### ⚠️ Breaking Changes
+
+In [#398](https://github.com/wxt-dev/wxt/pull/398), HTML pages' JS entrypoints in the output directory have been moved. Unless you're doing some kind of post-build work referencing files, you don't have to make any changes.
+
+- Before:
+   ```
+   .output/
+     <target>/
+       chunks/
+         some-shared-chunk-<hash>.js
+         popup-<hash>.js
+       popup.html
+   ```
+- After:
+   ```
+   .output/
+     <target>/
+       chunks/
+         some-shared-chunk-<hash>.js
+       popup.html
+       popup.js
+   ```
+
+This effects all HTML files, not just the Popup. The hash has been removed, and it's been moved to the root of the build target folder, not inside the `chunks/` directory. Moving files like this has not historically increased review times or triggered in-depth reviews when submitting updates to the stores.
+
+## v0.15.4
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.3...v0.15.4)
+
+### 🩹 Fixes
+
+- **submit:** Load `.env.submit` automatically when running `wxt submit` and `wxt submit init` ([#391](https://github.com/wxt-dev/wxt/pull/391))
+
+## v0.15.3
+
+[compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.2...v0.15.3)
+
+### 🩹 Fixes
+
+- **dev:** Reload `<name>/index.html` entrypoints properly on save ([#390](https://github.com/wxt-dev/wxt/pull/390))
+
 ## v0.15.2
 
 [compare changes](https://github.com/wxt-dev/wxt/compare/v0.15.1...v0.15.2)
@@ -14,7 +101,7 @@
 
 ### ❤️ Contributors
 
-- Nenad Novaković
+- Nenad Novaković ([@dvlden](https://github.com/dvlden))
 
 ## v0.15.1
 

demo/src/entrypoints/background.ts

@@ -1,37 +1,42 @@
 import messages from 'public/_locales/en/messages.json';
 
-export default defineBackground(() => {
-  console.log(browser.runtime.id);
-  logId();
-  console.log({
-    browser: import.meta.env.BROWSER,
-    chrome: import.meta.env.CHROME,
-    firefox: import.meta.env.FIREFOX,
-    manifestVersion: import.meta.env.MANIFEST_VERSION,
-    messages,
-  });
+export default defineBackground({
+  // type: 'module',
 
-  // @ts-expect-error: should only accept entrypoints or public assets
-  browser.runtime.getURL('/');
-  browser.runtime.getURL('/background.js');
-  browser.runtime.getURL('/icon/128.png');
-  browser.runtime.getURL('/example.html#hash');
-  browser.runtime.getURL('/example.html?query=param');
-  // @ts-expect-error: should only allow hashes/query params on HTML files
-  browser.runtime.getURL('/icon-128.png?query=param');
+  main() {
+    console.log(browser.runtime.id);
+    logId();
+    console.log({
+      url: import.meta.url,
+      browser: import.meta.env.BROWSER,
+      chrome: import.meta.env.CHROME,
+      firefox: import.meta.env.FIREFOX,
+      manifestVersion: import.meta.env.MANIFEST_VERSION,
+      messages,
+    });
 
-  // @ts-expect-error: should only accept known message names
-  browser.i18n.getMessage('test');
-  browser.i18n.getMessage('prompt_for_name');
-  browser.i18n.getMessage('hello', 'Aaron');
-  browser.i18n.getMessage('bye', ['Aaron']);
-  browser.i18n.getMessage('@@extension_id');
+    // @ts-expect-error: should only accept entrypoints or public assets
+    browser.runtime.getURL('/');
+    browser.runtime.getURL('/background.js');
+    browser.runtime.getURL('/icon/128.png');
+    browser.runtime.getURL('/example.html#hash');
+    browser.runtime.getURL('/example.html?query=param');
+    // @ts-expect-error: should only allow hashes/query params on HTML files
+    browser.runtime.getURL('/icon-128.png?query=param');
 
-  console.log('WXT MODE:', {
-    MODE: import.meta.env.MODE,
-    DEV: import.meta.env.DEV,
-    PROD: import.meta.env.PROD,
-  });
+    // @ts-expect-error: should only accept known message names
+    browser.i18n.getMessage('test');
+    browser.i18n.getMessage('prompt_for_name');
+    browser.i18n.getMessage('hello', 'Aaron');
+    browser.i18n.getMessage('bye', ['Aaron']);
+    browser.i18n.getMessage('@@extension_id');
 
-  storage.setItem('session:startTime', Date.now());
+    console.log('WXT MODE:', {
+      MODE: import.meta.env.MODE,
+      DEV: import.meta.env.DEV,
+      PROD: import.meta.env.PROD,
+    });
+
+    storage.setItem('session:startTime', Date.now());
+  },
 });

docs/.vitepress/components/UsingWxtSection.vue

@@ -17,6 +17,7 @@ const chromeExtensionIds = [
   'okifoaikfmpfcamplcfjkpdnhfodpkil', // Doozy: Ai Made Easy
   'lknmjhcajhfbbglglccadlfdjbaiifig', // tl;dv - Record, Transcribe & ChatGPT for Google Meet
   'youtube中文配音/oglffgiaiekgeicdgkdlnlkhliajdlja', // Youtube中文配音
+  'agjnjboanicjcpenljmaaigopkgdnihi', // PreMiD
 ];
 
 const { data } = useListExtensionDetails(chromeExtensionIds);

docs/.vitepress/config.ts

@@ -90,6 +90,7 @@ export default defineConfig({
             { text: 'Assets', link: '/guide/assets.md' },
             { text: 'Content Script UI', link: '/guide/content-script-ui.md' },
             { text: 'Multiple Browsers', link: '/guide/multiple-browsers.md' },
+            { text: 'ES Modules', link: '/guide/esm.md' },
             { text: 'Auto-imports', link: '/guide/auto-imports.md' },
             { text: 'Vite', link: '/guide/vite.md' },
             { text: 'Remote Code', link: '/guide/remote-code.md' },

docs/guide/esm.md

@@ -0,0 +1,38 @@
+# ES Modules
+
+Configure entrypoints to use ESM at runtime.
+
+Currently, ESM entrypoints are opt-in, so you must configure each entrypoint with that in mind.
+
+## HTML Pages <Badge type="warning" text="≥0.0.1" />
+
+In general, you should always make HTML pages import ESM scripts, unless you need to support old browsers.
+
+To make a script ESM, add `type="module"`:
+
+<!-- prettier-ignore -->
+```html
+<script src="./main.ts"></script> <!-- [!code --] -->
+<script src="./main.ts" type="module"></script> <!-- [!code ++] -->
+```
+
+## Background <Badge type="warning" text="≥0.16.0" />
+
+In your background script, set `type: "module"`:
+
+```ts
+export default defineBackground({
+  type: 'module', // !code ++
+  main() {
+    // ...
+  },
+});
+```
+
+:::warning
+Only MV3 support ESM background scripts/service workers. When targetting MV2, the `type` option is ignored and the background is always bundled into a single file as IIFE.
+:::
+
+## Content Scripts
+
+Coming soon. Follow [Content Script ESM Support #357](https://github.com/wxt-dev/wxt/issues/357) for updates.

docs/guide/installation.md

@@ -145,5 +145,6 @@ If you're an experienced web extension developer and think the dev manifest look
 You're ready to build your web extension!
 
 - Learn how to [add entrypoints](./entrypoints) like the popup, options page, or content scripts
+- Configure your entrypoints to [use ESM](./esm) at runtime
 - [Configure WXT](./configuration) by creating a `wxt.config.ts` file
 - Checkout [example projects](https://github.com/wxt-dev/wxt-examples) to see how to perfom common tasks with WXT

e2e/tests/output-structure.test.ts

@@ -227,4 +227,169 @@ describe('Output Directory Structure', () => {
       true,
     );
   });
+
+  it('should generate ESM background script when type=module', async () => {
+    const project = new TestProject();
+    project.addFile(
+      'utils/log.ts',
+      `export function logHello(name: string) {
+        console.log(\`Hello \${name}!\`);
+      }`,
+    );
+    project.addFile(
+      'entrypoints/background.ts',
+      `export default defineBackground({
+        type: "module",
+        main() {
+          logHello("background");
+        },
+      })`,
+    );
+    project.addFile(
+      'entrypoints/popup/index.html',
+      `<html>
+        <head>
+          <script type="module" src="./main.ts"></script>
+        </head>
+      </html>`,
+    );
+    project.addFile('entrypoints/popup/main.ts', `logHello('popup')`);
+
+    await project.build({
+      experimental: {
+        // Simplify the build output for comparison
+        includeBrowserPolyfill: false,
+      },
+      vite: () => ({
+        build: {
+          // Make output for snapshot readible
+          minify: false,
+        },
+      }),
+    });
+
+    expect(await project.serializeFile('.output/chrome-mv3/background.js'))
+      .toMatchInlineSnapshot(`
+      ".output/chrome-mv3/background.js
+      ----------------------------------------
+      import { l as logHello } from "./chunks/log-bezs0tt4.js";
+      function defineBackground(arg) {
+        if (typeof arg === "function")
+          return { main: arg };
+        return arg;
+      }
+      const definition = defineBackground({
+        type: "module",
+        main() {
+          logHello("background");
+        }
+      });
+      chrome;
+      function print(method, ...args) {
+        return;
+      }
+      var logger = {
+        debug: (...args) => print(console.debug, ...args),
+        log: (...args) => print(console.log, ...args),
+        warn: (...args) => print(console.warn, ...args),
+        error: (...args) => print(console.error, ...args)
+      };
+      try {
+        const res = definition.main();
+        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 crashed on startup!");
+        throw err;
+      }
+      "
+    `);
+  });
+
+  it('should generate IIFE background script when type=undefined', async () => {
+    const project = new TestProject();
+    project.addFile(
+      'utils/log.ts',
+      `export function logHello(name: string) {
+          console.log(\`Hello \${name}!\`);
+        }`,
+    );
+    project.addFile(
+      'entrypoints/background.ts',
+      `export default defineBackground({
+          main() {
+            logHello("background");
+          },
+        })`,
+    );
+    project.addFile(
+      'entrypoints/popup/index.html',
+      `<html>
+          <head>
+            <script type="module" src="./main.ts"></script>
+          </head>
+        </html>`,
+    );
+    project.addFile('entrypoints/popup/main.ts', `logHello('popup')`);
+
+    await project.build({
+      experimental: {
+        // Simplify the build output for comparison
+        includeBrowserPolyfill: false,
+      },
+      vite: () => ({
+        build: {
+          // Make output for snapshot readible
+          minify: false,
+        },
+      }),
+    });
+
+    expect(await project.serializeFile('.output/chrome-mv3/background.js'))
+      .toMatchInlineSnapshot(`
+        ".output/chrome-mv3/background.js
+        ----------------------------------------
+        (function() {
+          "use strict";
+          function defineBackground(arg) {
+            if (typeof arg === "function")
+              return { main: arg };
+            return arg;
+          }
+          function logHello(name) {
+            console.log(\`Hello \${name}!\`);
+          }
+          const definition = defineBackground({
+            main() {
+              logHello("background");
+            }
+          });
+          chrome;
+          function print(method, ...args) {
+            return;
+          }
+          var logger = {
+            debug: (...args) => print(console.debug, ...args),
+            log: (...args) => print(console.log, ...args),
+            warn: (...args) => print(console.warn, ...args),
+            error: (...args) => print(console.error, ...args)
+          };
+          try {
+            const res = definition.main();
+            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 crashed on startup!");
+            throw err;
+          }
+        })();
+        "
+      `);
+  });
 });

package.json

@@ -1,7 +1,7 @@
 {
   "name": "wxt",
   "type": "module",
-  "version": "0.15.2",
+  "version": "0.16.2",
   "description": "Next gen framework for developing web extensions",
   "engines": {
     "node": ">=18",
@@ -132,7 +132,7 @@
     "ora": "^7.0.1",
     "picocolors": "^1.0.0",
     "prompts": "^2.4.2",
-    "publish-browser-extension": "^2.0.0",
+    "publish-browser-extension": "^2.1.1",
     "rollup-plugin-visualizer": "^5.9.2",
     "unimport": "^3.4.0",
     "vite": "^5.0.12",

pnpm-lock.yaml

@@ -46,7 +46,7 @@ importers:
         version: 0.19.8
       fast-glob:
         specifier: ^3.3.1
-        version: 3.3.1
+        version: 3.3.2
       filesize:
         specifier: ^10.0.8
         version: 10.1.0
@@ -96,8 +96,8 @@ importers:
         specifier: ^2.4.2
         version: 2.4.2
       publish-browser-extension:
-        specifier: ^2.0.0
-        version: 2.0.0
+        specifier: ^2.1.1
+        version: 2.1.1
       rollup-plugin-visualizer:
         specifier: ^5.9.2
         version: 5.9.3
@@ -140,7 +140,7 @@ importers:
         version: 2.4.9
       '@vitest/coverage-v8':
         specifier: ^1.0.1
-        version: 1.0.1(vitest@1.1.0)
+        version: 1.2.2(vitest@1.1.0)
       execa:
         specifier: ^8.0.1
         version: 8.0.1
@@ -149,7 +149,7 @@ importers:
         version: 12.10.3
       lint-staged:
         specifier: ^15.2.0
-        version: 15.2.0
+        version: 15.2.1
       lodash.merge:
         specifier: ^4.6.2
         version: 4.6.2
@@ -158,7 +158,7 @@ importers:
         version: 4.1.5
       p-map:
         specifier: ^7.0.0
-        version: 7.0.0
+        version: 7.0.1
       prettier:
         specifier: ^3.1.0
         version: 3.1.1
@@ -399,20 +399,12 @@ packages:
       js-tokens: 4.0.0
     dev: false
 
-  /@babel/parser@7.23.5:
-    resolution: {integrity: sha512-hOOqoiNXrmGdFbhgCzu6GiURxUgM27Xwd/aPuu8RfHEZPBzL1Z54okAHAQjXfcQNwvrlkAmAp4SlRTZ45vlthQ==}
-    engines: {node: '>=6.0.0'}
-    hasBin: true
-    dependencies:
-      '@babel/types': 7.23.5
-    dev: true
-
   /@babel/parser@7.23.6:
     resolution: {integrity: sha512-Z2uID7YJ7oNvAI20O9X0bblw7Qqs8Q2hFy0R9tAfnfLkp5MW0UH9eUvnDSnFwKZ0AvgS1ucqR4KzvVHgnke1VQ==}
     engines: {node: '>=6.0.0'}
     hasBin: true
     dependencies:
-      '@babel/types': 7.23.5
+      '@babel/types': 7.23.9
     dev: true
 
   /@babel/runtime@7.23.9:
@@ -422,8 +414,8 @@ packages:
       regenerator-runtime: 0.14.0
     dev: false
 
-  /@babel/types@7.23.5:
-    resolution: {integrity: sha512-ON5kSOJwVO6xXVRTvOI0eOnWe7VdUcIpsovGo9U/Br4Ie4UVFQTboO2cYnDhAGU6Fp+UxSiT+pMft0SMHfuq6w==}
+  /@babel/types@7.23.9:
+    resolution: {integrity: sha512-dQjSq/7HaSjRM43FFGnv5keM2HsxpmyV1PfaSVm0nzzjwwTmjOe6J4bC8e3+pTEIgHaHj+1ZlLThRJ2auc/w1Q==}
     engines: {node: '>=6.9.0'}
     dependencies:
       '@babel/helper-string-parser': 7.23.4
@@ -1187,8 +1179,8 @@ packages:
       vue: 3.4.3(typescript@5.3.2)
     dev: true
 
-  /@vitest/coverage-v8@1.0.1(vitest@1.1.0):
-    resolution: {integrity: sha512-Z4a7ig4VjUCT/P+LRB3IZrBRXb9xWRUM8rSBH9cKgfrU1Oe01/K2WJKtGshOnQwXZoSfQtwCGpbnHmB/qJwjcw==}
+  /@vitest/coverage-v8@1.2.2(vitest@1.1.0):
+    resolution: {integrity: sha512-IHyKnDz18SFclIEEAHb9Y4Uxx0sPKC2VO1kdDCs1BF6Ip4S8rQprs971zIsooLUn7Afs71GRxWMWpkCGZpRMhw==}
     peerDependencies:
       vitest: ^1.0.0
     dependencies:
@@ -1200,7 +1192,7 @@ packages:
       istanbul-lib-source-maps: 4.0.1
       istanbul-reports: 3.1.6
       magic-string: 0.30.5
-      magicast: 0.3.2
+      magicast: 0.3.3
       picocolors: 1.0.0
       std-env: 3.6.0
       test-exclude: 6.0.0
@@ -1279,7 +1271,7 @@ packages:
   /@vue/compiler-sfc@3.3.10:
     resolution: {integrity: sha512-xpcTe7Rw7QefOTRFFTlcfzozccvjM40dT45JtrE3onGm/jBLZ0JhpKu3jkV7rbDFLeeagR/5RlJ2Y9SvyS0lAg==}
     dependencies:
-      '@babel/parser': 7.23.5
+      '@babel/parser': 7.23.6
       '@vue/compiler-core': 3.3.10
       '@vue/compiler-dom': 3.3.10
       '@vue/compiler-ssr': 3.3.10
@@ -2243,10 +2235,6 @@ packages:
     resolution: {integrity: sha512-I88TYZWc9XiYHRQ4/3c5rjjfgkjhLyW2luGIheGERbNQ6OY7yTybanSpDXZa8y7VUP9YmDcYa+eyq4ca7iLqWA==}
     dev: false
 
-  /emoji-regex@10.2.1:
-    resolution: {integrity: sha512-97g6QgOk8zlDRdgq1WxwgTMgEWGVAQvB5Fdpgc1MkNy56la5SKP9GsMXKDOdqwn90/41a8yPwIGk1Y6WVbeMQA==}
-    dev: false
-
   /emoji-regex@10.3.0:
     resolution: {integrity: sha512-QpLs9D9v9kArv4lfDEgg1X/gN5XLnf/A6l9cs8SPZLRZR3ZkY9+kwIQTxm+fsSej5UMYGE8fdoaZVIBlqG0XTw==}
 
@@ -2481,8 +2469,8 @@ packages:
       - supports-color
     dev: false
 
-  /fast-glob@3.3.1:
-    resolution: {integrity: sha512-kNFPyjhh5cKjrUltxs+wFx+ZkbRaxxmZ+X0ZU31SOsxCEtP9VPgtq2teZw1DebupL5GmDaNQ6yKMMVcM41iqDg==}
+  /fast-glob@3.3.2:
+    resolution: {integrity: sha512-oX2ruAFQwf/Orj8m737Y5adxDQO0LAB7/S5MnxCdTNDd4p6BsyIVsv9JQsATbTSq8KHRpLwIHbVlUNatxd+1Ow==}
     engines: {node: '>=8.6.0'}
     dependencies:
       '@nodelib/fs.stat': 2.0.5
@@ -2759,7 +2747,7 @@ packages:
     dependencies:
       array-union: 2.1.0
       dir-glob: 3.0.1
-      fast-glob: 3.3.1
+      fast-glob: 3.3.2
       ignore: 5.2.4
       merge2: 1.4.1
       slash: 3.0.0
@@ -3403,8 +3391,8 @@ packages:
       uhyphen: 0.2.0
     dev: false
 
-  /lint-staged@15.2.0:
-    resolution: {integrity: sha512-TFZzUEV00f+2YLaVPWBWGAMq7So6yQx+GG8YRMDeOEIf95Zn5RyiLMsEiX4KTNl9vq/w+NqRJkLA1kPIo15ufQ==}
+  /lint-staged@15.2.1:
+    resolution: {integrity: sha512-dhwAPnM85VdshybV9FWI/9ghTvMLoQLEXgVMx+ua2DN7mdfzd/tRfoU2yhMcBac0RHkofoxdnnJUokr8s4zKmQ==}
     engines: {node: '>=18.12.0'}
     hasBin: true
     dependencies:
@@ -3413,7 +3401,7 @@ packages:
       debug: 4.3.4
       execa: 8.0.1
       lilconfig: 3.0.0
-      listr2: 8.0.0
+      listr2: 8.0.1
       micromatch: 4.0.5
       pidtree: 0.6.0
       string-argv: 0.3.2
@@ -3422,8 +3410,8 @@ packages:
       - supports-color
     dev: true
 
-  /listr2@8.0.0:
-    resolution: {integrity: sha512-u8cusxAcyqAiQ2RhYvV7kRKNLgUvtObIbhOX2NCXqvp1UU32xIg5CT22ykS2TPKJXZWJwtK3IKLiqAGlGNE+Zg==}
+  /listr2@8.0.1:
+    resolution: {integrity: sha512-ovJXBXkKGfq+CwmKTjluEqFi3p4h8xvkxGQQAQan22YCgef4KZ1mKGjzfGh6PL6AW5Csw0QiQPNuQyH+6Xk3hA==}
     engines: {node: '>=18.0.0'}
     dependencies:
       cli-truncate: 4.0.0
@@ -3543,11 +3531,11 @@ packages:
     dependencies:
       '@jridgewell/sourcemap-codec': 1.4.15
 
-  /magicast@0.3.2:
-    resolution: {integrity: sha512-Fjwkl6a0syt9TFN0JSYpOybxiMCkYNEeOTnOTNRbjphirLakznZXAqrXgj/7GG3D1dvETONNwrBfinvAbpunDg==}
+  /magicast@0.3.3:
+    resolution: {integrity: sha512-ZbrP1Qxnpoes8sz47AM0z08U+jW6TyRgZzcWy3Ma3vDhJttwMwAFDMMQFobwdBxByBD46JYmxRzeF7w2+wJEuw==}
     dependencies:
-      '@babel/parser': 7.23.5
-      '@babel/types': 7.23.5
+      '@babel/parser': 7.23.6
+      '@babel/types': 7.23.9
       source-map-js: 1.0.2
     dev: true
 
@@ -3974,8 +3962,8 @@ packages:
     dependencies:
       yocto-queue: 1.0.0
 
-  /p-map@7.0.0:
-    resolution: {integrity: sha512-EZl03dLKv3RypkrjlevZoNwQMSy4bAblWcR18zhonktnN4fUs3asFQKSe0awn982omGxamvbejqQKQYDJYHCEg==}
+  /p-map@7.0.1:
+    resolution: {integrity: sha512-2wnaR0XL/FDOj+TgpDuRb2KTjLnu3Fma6b1ZUwGY7LcqenMcvP/YFpjpbPKY6WVGsbuJZRuoUz8iPrt8ORnAFw==}
     engines: {node: '>=18'}
     dev: true
 
@@ -4184,8 +4172,8 @@ packages:
       sade: 1.8.1
     dev: true
 
-  /publish-browser-extension@2.0.0:
-    resolution: {integrity: sha512-HzNfnsx2/yN1n288btH6xfmXzYA5e9FpjteJpR68qlevqKMQqbCw9AJOK2WdFKVBy1kuSil8XGuhpQWv3NcrnA==}
+  /publish-browser-extension@2.1.1:
+    resolution: {integrity: sha512-WqCnhHXbmiYn4vIbgcyKWVHiOvCoPjjpt3X+hfnU8rlOozU43TURpHUWZlQ0W49LhvJvBRsBfGRQxtRMGhqsxw==}
     engines: {node: '18', pnpm: '8'}
     hasBin: true
     dependencies:
@@ -4739,7 +4727,7 @@ packages:
     engines: {node: '>=16'}
     dependencies:
       eastasianwidth: 0.2.0
-      emoji-regex: 10.2.1
+      emoji-regex: 10.3.0
       strip-ansi: 7.1.0
     dev: false
 
@@ -5115,7 +5103,7 @@ packages:
     dependencies:
       '@rollup/pluginutils': 5.0.5
       escape-string-regexp: 5.0.0
-      fast-glob: 3.3.1
+      fast-glob: 3.3.2
       local-pkg: 0.4.3
       magic-string: 0.30.5
       mlly: 1.4.2

src/core/builders/vite/index.ts

@@ -63,6 +63,7 @@ export async function createViteBuilder(
       wxtPlugins.noopBackground(),
       wxtPlugins.globals(wxtConfig),
       wxtPlugins.excludeBrowserPolyfill(wxtConfig),
+      wxtPlugins.defineImportMeta(),
     );
     if (wxtConfig.analysis.enabled) {
       config.plugins.push(wxtPlugins.bundleAnalysis());
@@ -75,23 +76,7 @@ export async function createViteBuilder(
    * Return the basic config for building an entrypoint in [lib mode](https://vitejs.dev/guide/build.html#library-mode).
    */
   const getLibModeConfig = (entrypoint: Entrypoint): vite.InlineConfig => {
-    let virtualEntrypointType: VirtualEntrypointType | undefined;
-    switch (entrypoint.type) {
-      case 'background':
-      case 'unlisted-script':
-        virtualEntrypointType = entrypoint.type;
-        break;
-      case 'content-script':
-        virtualEntrypointType =
-          entrypoint.options.world === 'MAIN'
-            ? 'content-script-main-world'
-            : 'content-script-isolated-world';
-        break;
-    }
-    const entry = virtualEntrypointType
-      ? `virtual:wxt-${virtualEntrypointType}?${entrypoint.inputPath}`
-      : entrypoint.inputPath;
-
+    const entry = getRollupEntry(entrypoint);
     const plugins: NonNullable<vite.UserConfig['plugins']> = [
       wxtPlugins.entrypointGroupGlobals(entrypoint),
     ];
@@ -157,14 +142,16 @@ export async function createViteBuilder(
       build: {
         rollupOptions: {
           input: entrypoints.reduce<Record<string, string>>((input, entry) => {
-            input[entry.name] = entry.inputPath;
+            input[entry.name] = getRollupEntry(entry);
             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',
+            // Place JS entrypoints in main directory without a hash. (popup.html & popup.js are
+            // next to each other). The unique entrypoint name requirement prevents conflicts with
+            // scripts of the same name
+            entryFileNames: '[name].js',
             // We can't control the "name", so we need a hash to prevent conflicts
             assetFileNames: 'assets/[name]-[hash].[ext]',
           },
@@ -263,3 +250,26 @@ function getBuildOutputChunks(
   if (Array.isArray(result)) return result.flatMap(({ output }) => output);
   return result.output;
 }
+
+/**
+ * Returns the input module ID (virtual or real file) for an entrypoint. The returned string should
+ * be passed as an input to rollup.
+ */
+function getRollupEntry(entrypoint: Entrypoint): string {
+  let virtualEntrypointType: VirtualEntrypointType | undefined;
+  switch (entrypoint.type) {
+    case 'background':
+    case 'unlisted-script':
+      virtualEntrypointType = entrypoint.type;
+      break;
+    case 'content-script':
+      virtualEntrypointType =
+        entrypoint.options.world === 'MAIN'
+          ? 'content-script-main-world'
+          : 'content-script-isolated-world';
+      break;
+  }
+  return virtualEntrypointType
+    ? `virtual:wxt-${virtualEntrypointType}?${entrypoint.inputPath}`
+    : entrypoint.inputPath;
+}

src/core/builders/vite/plugins/defineImportMeta.ts

@@ -0,0 +1,19 @@
+/**
+ * Overrides definitions for `import.meta.*`
+ *
+ * - `import.meta.url`: Without this, background service workers crash trying to access
+ *   `document.location`, see https://github.com/wxt-dev/wxt/issues/392
+ */
+export function defineImportMeta() {
+  return {
+    name: 'wxt:define',
+    config() {
+      return {
+        define: {
+          // This works for all extension contexts, including background service worker
+          'import.meta.url': 'self.location.href',
+        },
+      };
+    },
+  };
+}

src/core/builders/vite/plugins/index.ts

@@ -12,3 +12,4 @@ export * from './globals';
 export * from './webextensionPolyfillMock';
 export * from './excludeBrowserPolyfill';
 export * from './entrypointGroupGlobals';
+export * from './defineImportMeta';

src/core/create-server.ts

@@ -8,7 +8,6 @@ import {
 } from '~/types';
 import {
   getEntrypointBundlePath,
-  getEntrypointOutputFile,
   resolvePerBrowserOption,
 } from '~/core/utils/entrypoints';
 import {
@@ -197,15 +196,6 @@ function createFileReloader(options: {
           .join(', ')}`,
       );
 
-      const rebuiltNames = changes.rebuildGroups
-        .flat()
-        .map((entry) => {
-          return pc.cyan(
-            relative(config.outDir, getEntrypointOutputFile(entry, '')),
-          );
-        })
-        .join(pc.dim(', '));
-
       // Rebuild entrypoints on change
       const allEntrypoints = await findEntrypoints(config);
       const { output: newOutput } = await rebuild(
@@ -221,15 +211,24 @@ function createFileReloader(options: {
       switch (changes.type) {
         case 'extension-reload':
           server.reloadExtension();
+          consola.success(`Reloaded extension`);
           break;
         case 'html-reload':
-          reloadHtmlPages(changes.rebuildGroups, server, config);
+          const { reloadedNames } = reloadHtmlPages(
+            changes.rebuildGroups,
+            server,
+            config,
+          );
+          consola.success(`Reloaded: ${getFilenameList(reloadedNames)}`);
           break;
         case 'content-script-reload':
           reloadContentScripts(changes.changedSteps, config, server);
+          const rebuiltNames = changes.rebuildGroups
+            .flat()
+            .map((entry) => entry.name);
+          consola.success(`Reloaded: ${getFilenameList(rebuiltNames)}`);
           break;
       }
-      consola.success(`Reloaded: ${rebuiltNames}`);
     });
   };
 }
@@ -279,9 +278,26 @@ function reloadHtmlPages(
   groups: EntrypointGroup[],
   server: WxtDevServer,
   config: InternalConfig,
-) {
-  groups.flat().forEach((entry) => {
+): { reloadedNames: string[] } {
+  // groups might contain other files like background/content scripts, and we only care about the HTMl pages
+  const htmlEntries = groups
+    .flat()
+    .filter((entry) => entry.inputPath.endsWith('.html'));
+
+  htmlEntries.forEach((entry) => {
     const path = getEntrypointBundlePath(entry, config.outDir, '.html');
     server.reloadPage(path);
   });
+
+  return {
+    reloadedNames: htmlEntries.map((entry) => entry.name),
+  };
+}
+
+function getFilenameList(names: string[]): string {
+  return names
+    .map((name) => {
+      return pc.cyan(name);
+    })
+    .join(pc.dim(', '));
 }

src/core/utils/building/__tests__/detect-dev-changes.test.ts

@@ -167,9 +167,9 @@ describe('Detect Dev Changes', () => {
   });
 
   describe('HTML Pages', () => {
-    it('should rebuild then reload only the effected pages', async () => {
+    it('should detect changes to entrypoints/<name>.html files', async () => {
       const config = fakeInternalConfig();
-      const changedPath = '/root/page1/index.html';
+      const changedPath = '/root/page1.html';
       const htmlPage1 = fakePopupEntrypoint({
         inputPath: changedPath,
       });
@@ -184,16 +184,66 @@ describe('Detect Dev Changes', () => {
       const step1: BuildStepOutput = {
         entrypoints: [htmlPage1, htmlPage2],
         chunks: [
-          fakeOutputChunk({
-            moduleIds: [fakeFile(), changedPath],
+          fakeOutputAsset({
+            fileName: 'page1.html',
           }),
         ],
       };
       const step2: BuildStepOutput = {
         entrypoints: [htmlPage3],
         chunks: [
-          fakeOutputChunk({
-            moduleIds: [fakeFile(), fakeFile(), fakeFile()],
+          fakeOutputAsset({
+            fileName: 'page2.html',
+          }),
+        ],
+      };
+
+      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(config, [changedPath], currentOutput);
+
+      expect(actual).toEqual(expected);
+    });
+
+    it('should detect changes to entrypoints/<name>/index.html files', async () => {
+      const config = fakeInternalConfig();
+      const changedPath = '/root/page1/index.html';
+      const htmlPage1 = fakePopupEntrypoint({
+        inputPath: changedPath,
+      });
+      const htmlPage2 = fakeOptionsEntrypoint({
+        inputPath: '/root/page2/index.html',
+      });
+      const htmlPage3 = fakeGenericEntrypoint({
+        type: 'sandbox',
+        inputPath: '/root/page3/index.html',
+      });
+
+      const step1: BuildStepOutput = {
+        entrypoints: [htmlPage1, htmlPage2],
+        chunks: [
+          fakeOutputAsset({
+            fileName: 'page1.html',
+          }),
+        ],
+      };
+      const step2: BuildStepOutput = {
+        entrypoints: [htmlPage3],
+        chunks: [
+          fakeOutputAsset({
+            fileName: 'page2.html',
           }),
         ],
       };

src/core/utils/building/__tests__/find-entrypoints.test.ts

@@ -27,6 +27,7 @@ const readFileMock = vi.mocked(
 
 describe('findEntrypoints', () => {
   const config = fakeInternalConfig({
+    manifestVersion: 3,
     root: '/',
     entrypointsDir: resolve('/src/entrypoints'),
     outDir: resolve('.output'),
@@ -254,6 +255,32 @@ describe('findEntrypoints', () => {
     },
   );
 
+  it('should remove type=module from MV2 background scripts', async () => {
+    const config = fakeInternalConfig({ manifestVersion: 2 });
+    const options: BackgroundEntrypoint['options'] = {
+      type: 'module',
+    };
+    globMock.mockResolvedValueOnce(['background.ts']);
+    importEntrypointFileMock.mockResolvedValue(options);
+
+    const entrypoints = await findEntrypoints(config);
+
+    expect(entrypoints[0].options).toEqual({});
+  });
+
+  it('should allow type=module for MV3 background service workers', async () => {
+    const config = fakeInternalConfig({ manifestVersion: 3 });
+    const options: BackgroundEntrypoint['options'] = {
+      type: 'module',
+    };
+    globMock.mockResolvedValueOnce(['background.ts']);
+    importEntrypointFileMock.mockResolvedValue(options);
+
+    const entrypoints = await findEntrypoints(config);
+
+    expect(entrypoints[0].options).toEqual(options);
+  });
+
   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(['popup.html']);
 

src/core/utils/building/__tests__/group-entrypoints.test.ts

@@ -1,6 +1,11 @@
 import { describe, expect, it } from 'vitest';
 import { Entrypoint } from '~/types';
 import { groupEntrypoints } from '../group-entrypoints';
+import {
+  fakeBackgroundEntrypoint,
+  fakeGenericEntrypoint,
+  fakePopupEntrypoint,
+} from '../../testing/fake-objects';
 
 const background: Entrypoint = {
   type: 'background',
@@ -141,4 +146,29 @@ describe('groupEntrypoints', () => {
 
     expect(actual).toEqual(expected);
   });
+
+  it('should group ESM compatible scripts with extension pages', () => {
+    const background = fakeBackgroundEntrypoint({
+      options: {
+        type: 'module',
+      },
+    });
+    const popup = fakePopupEntrypoint();
+    const sandbox = fakeGenericEntrypoint({
+      inputPath: '/entrypoints/sandbox.html',
+      name: 'sandbox',
+      type: 'sandbox',
+    });
+
+    const actual = groupEntrypoints([background, popup, sandbox]);
+
+    expect(actual).toEqual([[background, popup], [sandbox]]);
+  });
+
+  it.todo(
+    'should group ESM compatible sandbox scripts with sandbox pages',
+    () => {
+      // Main world content scripts
+    },
+  );
 });

src/core/utils/building/detect-dev-changes.ts

@@ -123,11 +123,12 @@ function findEffectedSteps(
   const changedPath = normalizePath(changedFile);
 
   const isChunkEffected = (chunk: OutputFile): 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 an HTML file with the same path, is is effected because HTML files need to be re-rendered
+    // - fileName is normalized, relative bundle path, "<entrypoint-name>.html"
+    (chunk.type === 'asset' &&
+      changedPath.replace('/index.html', '.html').endsWith(chunk.fileName)) ||
     // If it's a chunk that depends on the changed file, it is effected
-    // moduleIds are absolute, normalized paths
+    // - moduleIds are absolute, normalized paths
     (chunk.type === 'chunk' && chunk.moduleIds.includes(changedPath));
 
   for (const step of currentOutput.steps) {

src/core/utils/building/find-entrypoints.ts

@@ -392,6 +392,11 @@ async function getBackgroundEntrypoint(
     const { main: _, ...moduleOptions } = defaultExport;
     options = moduleOptions;
   }
+
+  if (config.manifestVersion !== 3) {
+    delete options.type;
+  }
+
   return {
     type: 'background',
     name,

src/core/utils/building/group-entrypoints.ts

@@ -11,8 +11,11 @@ export function groupEntrypoints(entrypoints: Entrypoint[]): EntrypointGroup[] {
   const groups: EntrypointGroup[] = [];
 
   for (const entry of entrypoints) {
-    const group = ENTRY_TYPE_TO_GROUP_MAP[entry.type];
-    if (group === 'no-group') {
+    let group = ENTRY_TYPE_TO_GROUP_MAP[entry.type];
+    if (entry.type === 'background' && entry.options.type === 'module') {
+      group = 'esm';
+    }
+    if (group === 'individual') {
       groups.push(entry);
     } else {
       let groupIndex = groupIndexMap[group];
@@ -28,22 +31,22 @@ export function groupEntrypoints(entrypoints: Entrypoint[]): EntrypointGroup[] {
 }
 
 const ENTRY_TYPE_TO_GROUP_MAP: Record<Entrypoint['type'], Group> = {
-  sandbox: 'sandbox-page',
+  sandbox: 'sandboxed-esm',
 
-  popup: 'extension-page',
-  newtab: 'extension-page',
-  history: 'extension-page',
-  options: 'extension-page',
-  devtools: 'extension-page',
-  bookmarks: 'extension-page',
-  sidepanel: 'extension-page',
-  'unlisted-page': 'extension-page',
+  popup: 'esm',
+  newtab: 'esm',
+  history: 'esm',
+  options: 'esm',
+  devtools: 'esm',
+  bookmarks: 'esm',
+  sidepanel: 'esm',
+  'unlisted-page': 'esm',
 
-  background: 'no-group',
-  'content-script': 'no-group',
-  'unlisted-script': 'no-group',
-  'unlisted-style': 'no-group',
-  'content-script-style': 'no-group',
+  background: 'individual',
+  'content-script': 'individual',
+  'unlisted-script': 'individual',
+  'unlisted-style': 'individual',
+  'content-script-style': 'individual',
 };
 
-type Group = 'extension-page' | 'sandbox-page' | 'no-group';
+type Group = 'esm' | 'sandboxed-esm' | 'individual';

templates/react/package.json

@@ -23,6 +23,6 @@
     "@types/react-dom": "^18.2.18",
     "@vitejs/plugin-react": "^4.2.1",
     "typescript": "^5.3.3",
-    "wxt": "^0.15.0"
+    "wxt": "^0.16.0"
   }
 }

templates/solid/package.json

@@ -20,6 +20,6 @@
   "devDependencies": {
     "typescript": "^5.3.3",
     "vite-plugin-solid": "^2.8.0",
-    "wxt": "^0.15.0"
+    "wxt": "^0.16.0"
   }
 }

templates/svelte/package.json

@@ -20,6 +20,6 @@
     "svelte-check": "^3.6.2",
     "tslib": "^2.6.2",
     "typescript": "^5.3.3",
-    "wxt": "^0.15.0"
+    "wxt": "^0.16.0"
   }
 }

templates/vanilla/package.json

@@ -16,6 +16,6 @@
   },
   "devDependencies": {
     "typescript": "^5.3.3",
-    "wxt": "^0.15.0"
+    "wxt": "^0.16.0"
   }
 }

templates/vue/package.json

@@ -21,6 +21,6 @@
     "@vitejs/plugin-vue": "^5.0.1",
     "typescript": "^5.3.3",
     "vue-tsc": "^1.8.27",
-    "wxt": "^0.15.0"
+    "wxt": "^0.16.0"
   }
 }