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docs: add v1.58 release notes#38879

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Skn0tt merged 11 commits intomicrosoft:mainfrom
Skn0tt:release-notes-1.58
Jan 22, 2026
Merged

docs: add v1.58 release notes#38879
Skn0tt merged 11 commits intomicrosoft:mainfrom
Skn0tt:release-notes-1.58

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@Skn0tt Skn0tt commented Jan 21, 2026

Summary

Adds release notes for v1.58, covering:

  • Sharding improvements (per-shard duration reporting, custom weights, shardIndex API)
  • Worker fixture timeouts
  • New toHaveCSS overload with React.CSSProperties
  • UI Mode and Trace Viewer improvements (thanks @cpAdm!)
  • Breaking changes

TODO

  • Add screenshot for Shard Duration chart

🤖 Generated with Claude Code

Skn0tt and others added 2 commits January 21, 2026 10:39
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@Skn0tt Skn0tt marked this pull request as ready for review January 21, 2026 10:54
@Skn0tt Skn0tt requested a review from dgozman January 21, 2026 10:54
Comment thread docs/src/release-notes-js.md Outdated
Comment thread docs/src/release-notes-js.md Outdated
Comment thread docs/src/release-notes-js.md Outdated
Comment thread docs/src/release-notes-js.md Outdated
Comment thread docs/src/release-notes-js.md Outdated
Comment thread docs/src/release-notes-js.md Outdated
Skn0tt and others added 6 commits January 21, 2026 12:24
Co-authored-by: Dmitry Gozman <dgozman@gmail.com>
Signed-off-by: Simon Knott <info@simonknott.de>
Co-authored-by: Dmitry Gozman <dgozman@gmail.com>
Signed-off-by: Simon Knott <info@simonknott.de>
Co-authored-by: Dmitry Gozman <dgozman@gmail.com>
Signed-off-by: Simon Knott <info@simonknott.de>
Co-authored-by: Dmitry Gozman <dgozman@gmail.com>
Signed-off-by: Simon Knott <info@simonknott.de>
@mahtabnejad90
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can we please release already its been almost 2 months since the last release 👀

Skn0tt and others added 2 commits January 22, 2026 11:09
- Remove toHaveCSS with React.CSSProperties (reverted in microsoft#38900)
- Remove shard weights and shardIndex mentions (made private)
- Add connectOverCDP isLocal option (microsoft#38614)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Comment thread docs/src/release-notes-js.md Outdated

### Timeline

If you're using [merged reports](./test-sharding.md#merging-reports-from-multiple-environments), the HTML report Speedboard tab now shows a Gantt shard of how long each test bot took:
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Suggested change
If you're using [merged reports](./test-sharding.md#merging-reports-from-multiple-environments), the HTML report Speedboard tab now shows a Gantt shard of how long each test bot took:
If you're using [merged reports](./test-sharding.md#merging-reports-from-multiple-environments), the HTML report Speedboard tab now shows the Timeline:

Comment thread docs/src/release-notes-js.md Outdated

[`method: BrowserType.connectOverCDP`] now accepts an `isLocal` option. When set to `true`, it tells Playwright that it runs on the same host as the CDP server, enabling file system optimizations.

```ts
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We can drop this snippet, it's so very niche.

@Skn0tt Skn0tt merged commit ba4b983 into microsoft:main Jan 22, 2026
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3 participants