chore: release notes for v1.49 js (#33565)

docs/src/release-notes-js.md

@@ -8,6 +8,36 @@ import LiteYouTube from '@site/src/components/LiteYouTube';
 
 ## Version 1.49
 
+### Aria snapshots
+
+New assertion [`method: LocatorAssertions.toMatchAriaSnapshot`] verifies page structure by comparing to an expected accessibility tree, represented as YAML.
+
+```js
+await page.goto('https://playwright.dev');
+await expect(page.locator('body')).toMatchAriaSnapshot(`
+  - banner:
+    - heading /Playwright enables reliable/ [level=1]
+    - link "Get started"
+    - link "Star microsoft/playwright on GitHub"
+  - main:
+    - img "Browsers (Chromium, Firefox, WebKit)"
+    - heading "Any browser • Any platform • One API"
+`);
+```
+
+You can generate this assertion with [Test Generator](./codegen) and update the expected snapshot with `--update-snapshots` command line flag.
+
+Learn more in the [aria snapshots guide](./aria-snapshots).
+
+### Test runner
+
+- New option [`property: TestConfig.tsconfig`] allows to specify a single `tsconfig` to be used for all tests.
+- New method [`method: Test.fail.only`] to focus on a failing test.
+- Options [`property: TestConfig.globalSetup`] and [`property: TestConfig.globalTeardown`] now support multiple setups/teardowns.
+- New value `'on-first-failure'` for [`property: TestOptions.screenshot`].
+- Added "previous" and "next" buttons to the HTML report to quickly switch between test cases.
+- New properties [`property: TestInfoError.cause`] and [`property: TestError.cause`] mirroring [`Error.cause`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/cause).
+
 ### Breaking: channels `chrome`, `msedge` and similar switch to new headless
 
 Prior to this release, Playwright was running the old established implementation of [Chromium headless mode](https://developer.chrome.com/docs/chromium/headless). However, Chromium had entirely **switched to the new headless mode**, and **removed the old one**.
@@ -56,6 +86,18 @@ export default defineConfig({
 });
 ```
 
+### Other breaking changes
+
+- There will be no more updates for WebKit on Ubuntu 20.04 and Debian 11. We recommend updating your OS to a later version.
+- Package `@playwright/experimental-ct-vue2` will no longer be updated.
+- Package `@playwright/experimental-ct-solid` will no longer be updated.
+
+### Miscellaneous
+
+- `<canvas>` elements inside a snapshot now draw a preview.
+- New method [`method: Tracing.group`] to visually group actions in the trace.
+- Playwright docker images switched from Node.js v20 to Node.js v22 LTS.
+
 ### Browser Versions
 
 - Chromium 131.0.6778.33