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Updates for Safari TP 252 - #30488

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caugner merged 1 commit into
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Elchi3:safari-tp-252
Sep 15, 2026
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caugner merged 1 commit into
mdn:mainfrom
Elchi3:safari-tp-252

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@Elchi3

@Elchi3 Elchi3 commented Sep 11, 2026 •

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Summary

The https://collector.openwebdocs.org/ project (v10.20.10) found new features shipping in Safari Technical Preview 252 on macOS 27 which was released today. Currently, the collector covers about 90% of BCD, so the following list might not be exhaustive.

  • api.CSSMediaRule.matches
  • api.CSSSupportsRule.matches
  • api.Request.duplex
  • css.properties.user-select

Release notes: https://webkit.org/blog/18304/release-notes-for-safari-technology-preview-252/

@github-actions github-actions Bot added data:api Compatibility data for Web API features. https://developer.mozilla.org/docs/Web/API data:css Compatibility data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:m Pull request changing 25-100 lines of code. labels Sep 11, 2026
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Tip: Review these changes grouped by change (recommended for most PRs), or grouped by feature (for large PRs).

Comment thread api/Request.json
"opera_android": "mirror",
"safari": {
"version_added": false,
"impl_url": "https://webkit.org/b/245671"

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Confirmed via WebKit/WebKit@df40d92.

@caugner
caugner merged commit be3c704 into mdn:main Sep 15, 2026
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@mdn-bot mdn-bot mentioned this pull request Sep 15, 2026
@Elchi3
Elchi3 deleted the safari-tp-252 branch September 15, 2026 15:42
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data:api Compatibility data for Web API features. https://developer.mozilla.org/docs/Web/API data:css Compatibility data for CSS features. https://developer.mozilla.org/docs/Web/CSS size:m Pull request changing 25-100 lines of code.

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2 participants