feat: support chrome headless mode

.github/workflows/main.yml

@@ -201,17 +201,14 @@ jobs:
         uses: actions/setup-node@v3.1.1
         with:
           node-version: ${{ matrix.node }}
-
       - name: Install dependencies
         run: |
           sudo apt-get install xvfb
           npm install
           ls .local-chromium
-
       - name: Build
         run: |
           npm run build
-
       - name: Run unit tests in headful mode
         uses: nick-invision/retry@v2
         continue-on-error: true
@@ -222,3 +219,36 @@ jobs:
           max_attempts: 1
           command: xvfb-run --auto-servernum npm run unit
           timeout_minutes: 10
+
+  chrome-headless-checks:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        # https://github.com/actions/virtual-environments#available-environments
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        node: [16]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 2
+      - name: Set up Node.js
+        uses: actions/setup-node@v3.1.1
+        with:
+          node-version: ${{ matrix.node }}
+      - name: Install dependencies
+        run: |
+          npm install
+          ls .local-chromium
+      - name: Build
+        run: |
+          npm run build
+      - name: Run unit tests
+        uses: nick-invision/retry@v2
+        continue-on-error: true
+        env:
+          CHROMIUM: true
+        with:
+          max_attempts: 1
+          command: npm run chrome-headless-unit
+          timeout_minutes: 30

docs/api.md

@@ -580,7 +580,7 @@ This methods attaches Puppeteer to an existing browser instance.
 #### puppeteer.defaultArgs([options])
 
 - `options` <[Object]> Set of configurable options to set on the browser. Can have the following fields:
-  - `headless` <[boolean]> Whether to run browser in [headless mode](https://developers.google.com/web/updates/2017/04/headless-chrome). Defaults to `true` unless the `devtools` option is `true`.
+  - `headless` <[boolean]|"chrome"> Whether to run browser in [headless mode](https://developers.google.com/web/updates/2017/04/headless-chrome). Defaults to `true` unless the `devtools` option is `true`. "chrome" is a new experimental headless mode (use at your own risk).
   - `args` <[Array]<[string]>> Additional arguments to pass to the browser instance. The list of Chromium flags can be found [here](http://peter.sh/experiments/chromium-command-line-switches/).
   - `userDataDir` <[string]> Path to a [User Data Directory](https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/user_data_dir.md).
   - `devtools` <[boolean]> Whether to auto-open a DevTools panel for each tab. If this option is `true`, the `headless` option will be set `false`.
@@ -646,7 +646,7 @@ try {
 - `options` <[Object]> Set of configurable options to set on the browser. Can have the following fields:
   - `product` <[string]> Which browser to launch. At this time, this is either `chrome` or `firefox`. See also `PUPPETEER_PRODUCT`.
   - `ignoreHTTPSErrors` <[boolean]> Whether to ignore HTTPS errors during navigation. Defaults to `false`.
-  - `headless` <[boolean]> Whether to run browser in [headless mode](https://developers.google.com/web/updates/2017/04/headless-chrome). Defaults to `true` unless the `devtools` option is `true`.
+  - `headless` <[boolean]|"chrome"> Whether to run browser in [headless mode](https://developers.google.com/web/updates/2017/04/headless-chrome). Defaults to `true` unless the `devtools` option is `true`. "chrome" is a new experimental headless mode (use at your own risk).
   - `channel` <[string]> When specified, Puppeteer will search for the locally installed release channel of Google Chrome and use it to launch. Available values are `chrome`, `chrome-beta`, `chrome-canary`, `chrome-dev`. When channel is specified, `executablePath` cannot be specified.
   - `executablePath` <[string]> Path to a browser executable to run instead of the bundled Chromium. If `executablePath` is a relative path, then it is resolved relative to [current working directory](https://nodejs.org/api/process.html#process_process_cwd). **BEWARE**: Puppeteer is only [guaranteed to work](https://github.com/puppeteer/puppeteer/#q-why-doesnt-puppeteer-vxxx-work-with-chromium-vyyy) with the bundled Chromium, use at your own risk.
   - `slowMo` <[number]> Slows down Puppeteer operations by the specified amount of milliseconds. Useful so that you can see what is going on.

package.json

@@ -18,6 +18,7 @@
     "test-browser": "wtr",
     "test-browser-watch": "wtr --watch",
     "unit": "npm run tsc-cjs && mocha --config mocha-config/puppeteer-unit-tests.js",
+    "chrome-headless-unit": "cross-env HEADLESS=chrome npm run unit",
     "unit-debug": "npm run tsc-cjs && mocha --inspect-brk --config mocha-config/puppeteer-unit-tests.js",
     "unit-with-coverage": "cross-env COVERAGE=1 npm run unit",
     "assert-unit-coverage": "cross-env COVERAGE=1 mocha --config mocha-config/coverage-tests.js",

src/node/LaunchOptions.ts

@@ -27,7 +27,7 @@ export interface BrowserLaunchArgumentOptions {
    * Whether to run the browser in headless mode.
    * @defaultValue true
    */
-  headless?: boolean;
+  headless?: boolean | 'chrome';
   /**
    * Path to a user data directory.
    * {@link https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/user_data_dir.md | see the Chromium docs}

src/node/Launcher.ts

@@ -241,7 +241,11 @@ class ChromeLauncher implements ProductLauncher {
       chromeArguments.push(`--user-data-dir=${path.resolve(userDataDir)}`);
     if (devtools) chromeArguments.push('--auto-open-devtools-for-tabs');
     if (headless) {
-      chromeArguments.push('--headless', '--hide-scrollbars', '--mute-audio');
+      chromeArguments.push(
+        headless === 'chrome' ? '--headless=chrome' : '--headless',
+        '--hide-scrollbars',
+        '--mute-audio'
+      );
     }
     if (args.every((arg) => arg.startsWith('-')))
       chromeArguments.push('about:blank');

test/mocha-utils.ts

@@ -64,8 +64,8 @@ const product =
 
 const alternativeInstall = process.env.PUPPETEER_ALT_INSTALL || false;
 
-const isHeadless =
-  (process.env.HEADLESS || 'true').trim().toLowerCase() === 'true';
+const headless = (process.env.HEADLESS || 'true').trim().toLowerCase();
+const isHeadless = headless === 'true' || headless === 'chrome';
 const isFirefox = product === 'firefox';
 const isChrome = product === 'Chromium';
 
@@ -82,7 +82,7 @@ const defaultBrowserOptions = Object.assign(
   {
     handleSIGINT: true,
     executablePath: process.env.BINARY,
-    headless: isHeadless,
+    headless: headless === 'chrome' ? ('chrome' as const) : isHeadless,
     dumpio: !!process.env.DUMPIO,
   },
   extraLaunchOptions