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FF151 Relnote: shadowrootslotassignment#43881

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pepelsbey merged 2 commits intomdn:mainfrom
hamishwillee:ff151_relnote_shadowrootslotassignment
May 5, 2026
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FF151 Relnote: shadowrootslotassignment#43881
pepelsbey merged 2 commits intomdn:mainfrom
hamishwillee:ff151_relnote_shadowrootslotassignment

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FF152 added support for declarative slot assignment using the shadowrootslotassignment attribute on <template> in https://bugzilla.mozilla.org/show_bug.cgi?id=2023824

This adds the release note.

Related docs work can be tracked in #43866

@hamishwillee hamishwillee requested a review from a team as a code owner April 21, 2026 02:08
@hamishwillee hamishwillee requested review from pepelsbey and removed request for a team April 21, 2026 02:08
@github-actions github-actions Bot added Content:Firefox Content in the Mozilla/Firefox subtree size/s [PR only] 6-50 LoC changed labels Apr 21, 2026
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github-actions Bot commented Apr 21, 2026

Preview URLs (1 page)

Flaws (1)

Found an unexpected or unresolvable flaw? Please report it here.

URL: /en-US/docs/Mozilla/Firefox/Releases/151
Title: Firefox 151 release notes for developers (Beta)
Flaw count: 1

  • macros:
    • Macro domxref produces link /en-US/docs/Web/API/HTMLTemplateElement/shadowRootSlotAssignment which doesn't resolve
External URLs (2)

URL: /en-US/docs/Mozilla/Firefox/Releases/151
Title: Firefox 151 release notes for developers (Beta)

(comment last updated: 2026-05-05 07:27:49)

@hamishwillee hamishwillee force-pushed the ff151_relnote_shadowrootslotassignment branch from afbf1e5 to 94720d7 Compare April 24, 2026 02:02
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Looks good! Thank you 🙂

Just a mistype.

Comment thread files/en-us/mozilla/firefox/releases/151/index.md Outdated
@pepelsbey pepelsbey merged commit 823fae4 into mdn:main May 5, 2026
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pepelsbey added a commit to pepelsbey/mdn-content that referenced this pull request May 6, 2026
* upstream/main: (150 commits)
  PWA relative links (mdn#43953)
  feat(jsondata): add `external_link` translation key (mdn#43978)
  Clarify when var() falls back to its second argument (mdn#44015)
  Correct incorrect filename on learn assessment (mdn#44012)
  FF151 Relnote CanvasRenderingContext2D.lang (mdn#44010)
  FF151: Update container style queries support (mdn#44002)
  Firefox experimental features clean-up (mdn#43887)
  FF151 Relnote: shadowrootslotassignment (mdn#43881)
  Editorial review: Document WebGPU compatibility mode (mdn#43944)
  Correction of solution (mdn#44001)
  Synchronize with BCD v7.3.14 (mdn#44007)
  Editorial review: Document texture_and_sampler_let WGSL feature (mdn#43768)
  Editorial review: Document NavigationTransition.committed (mdn#43692)
  Update window.open on document / window creation and load behavior (mdn#43913)
  FF151 Relnote: keyboardLock option for Element.requestFullScreen() (mdn#43883)
  FF118 keyboard value for Window Event tidy (mdn#43942)
  Bump yaml from 2.8.3 to 2.8.4 (mdn#44005)
  Rename Stylesheet glossary definition to Style sheet (mdn#43997)
  Clarify else-if evaluation order (mdn#43917)
  chore(dictionaries): add technical terms flagged by spelling check (mdn#43907)
  ...

# Conflicts:
#	files/en-us/web/api/svgscriptelement/async/index.md
#	files/en-us/web/api/svgscriptelement/index.md
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3 participants