This is a continuously-updated prerelease generated from main (currently at 8141105).

What's Upcoming

• In an October release, web-features will relax a constraint on feature entries, such that @mdn/browser-compat-data keys may appear in more than one feature at a time. See #2613 (comment) for more information.

What's Changed

• background-position: backfill compat keys by @ddbeck in #4414
• clip-path: backfill none value compat key by @ddbeck in #4416
• font-size: backfill keyword values compat keys by @ddbeck in #4417
• text-shadow: backfill none value compat key by @ddbeck in #4409
• pointer-events: backfill compat keys by @ddbeck in #4411
• svg: backfill compat keys by @ddbeck in #4412
• Group more CSS text features by @ddbeck in #4407
• html-setters and html-streaming-setters: remove DocumentType APIs by @tunetheweb in #4449
• display-contents: reinstate compat keys and unfreeze status by @ddbeck in #4388
• Bump @mdn/browser-compat-data from 8.1.3 to 8.1.4 by @dependabot[bot] in #4458

Full Changelog: v3.40.0...v3.40.1

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What's Upcoming

• In an October release, web-features will relax a constraint on feature entries, such that @mdn/browser-compat-data keys may appear in more than one feature at a time. See #2613 (comment) for more information.

What's New

• 6 features: container-name-queries, gamut-mapping, iterator-join, string-trim-leftright, supports-named-feature, symbols-function
• 4 status changes:
  • Baseline newly available: arianotify
  • Baseline widely available: abortsignal-any, paint-order, white-space-collapse

What's Changed

• Update wasm-extended-constant-expressions spec URL by @gsnedders in #4354
• Update wasm-jspi spec URL by @gsnedders in #4355
• Update wasm-memory64 spec URL by @gsnedders in #4356
• Update wasm-tail-call-optimization spec URL by @gsnedders in #4361
• Update wasm-typed-fun-refs spec URL by @gsnedders in #4362
• import-defer: include import.defer() as part of this feature by @ddbeck in #4385
• Add named-feature() feature by @ddbeck in #4272
• uint8array-base64-hex: revise description by @ddbeck in #4254
• Add discouraged feature for trimLeft() and trimRight() by @ddbeck in #4386
• Disambiguate container size queries feature by @ddbeck in #4310
• Add name-only container queries feature by @ddbeck in #4311
• Remove replaceHTML from HTML setters features by @tunetheweb in #4382
• Extract the symbols() CSS function to a separate feature by @captainbrosset in #4394
• symbols() CSS function: revise ID and description by @ddbeck in #4400
• Add textStream to html-streaming-setters by @tunetheweb in #4383
• Add gamut mapping feature by @ddbeck in #4392
• Add feature for Iterator.prototype.join() by @ddbeck in #4403
• outline: assign auto value compat key by @ddbeck in #4408
• Bump @mdn/browser-compat-data from 8.1.2 to 8.1.3 by @dependabot[bot] in #4422

Full Changelog: v3.39.0...v3.40.0

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What's New

• The grid-lanes ID is now the canonical ID for masonry. The masonry entry now has the "moved" kind, with a redirect to the new ID. The grid-lanes entry now contains an updated name and description.
• The media-pseudos feature regressed from Baseline newly available to limited availability. This is due to an an upstream data error that prematurely showed media element pseudo-classes as shipped.
• 7 features: geolocation-element-initialpermissionstatus, html-setters, html-streaming-setters, import-maps-multiple, input-date-time-month, input-date-time-week, shared-workers-extended-lifetime
• 1 group: anchor-positioning
• 8 status changes:
  • Baseline newly available: alpha, async-iterable-streams, autocorrect, light-dark-image, overflow-anchor, top-level-await, wasm-jspi
  • Limited availability: media-pseudos

What's Changed

• Make grid lanes canonical and masonry redirect by @jdatapple in #4225
• Add container-anchor-position-queries to container-queries group by @ddbeck in #4312
• Add an anchor-positioning group by @ddbeck in #4313
• Revise performance timing entries' names and descriptions by @ddbeck in #4278
• Update arianotify spec URL by @gsnedders in #4347
• select: add HTMLOptionsCollection compat keys by @ddbeck in #4367
• Update webdriver-bidi with the new BCD keys by @captainbrosset in #2777
• Update install spec URL by @gsnedders in #4348
• webdriver-bidi: refresh data by @ddbeck in #4368
• Update languagemodel spec URL by @gsnedders in #4349
• Update wasm-branch-hinting spec URL by @gsnedders in #4352
• Add HTML setters features by @tunetheweb in #4318
• Update loading-lazy-media spec URL by @gsnedders in #4350
• Add caniuse mappings where the IDs are different by @foolip in #3301
• Add feature for extended-lifetime shared workers by @jgraham in #4341
• Update usermedia spec URL by @gsnedders in #4351
• Add initialPermissionStatus discouraged feature by @ddbeck in #4365
• Split out type=week|month input types from input-date-time by @jgraham in #4371
• Add a feature for multiple import maps by @jgraham in #4373
• Bump @mdn/browser-compat-data from 8.1.1 to 8.1.2 by @dependabot[bot] in #4376

New Contributors

• @jdatapple made their first contribution in #4225
• @gsnedders made their first contribution in #4347

Full Changelog: v3.38.0...v3.39.0

What's New

• 2 features: cookie-store-get-metadata, link-parameters
• 5 status changes:
  • Baseline widely available: array-group, check-visibility, promise-withresolvers, transferable-arraybuffer, wasm-extended-constant-expressions

What's Changed

• Add cookie-store-get-metadata feature by @jgraham in #4189
• Add toJSON methods to soft-navigations and interaction-contentful-paint features by @tunetheweb in #4323
• Bump @mdn/browser-compat-data from 8.0.14 to 8.1.0 by @dependabot[bot] in #4319
• Add link parameters feature by @captainbrosset in #4322
• Don't let attr()'s status block on <url> type by @ddbeck in #4334
• Bump @mdn/browser-compat-data from 8.1.0 to 8.1.1 by @dependabot[bot] in #4337

Full Changelog: v3.37.0...v3.38.0

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What's New

• 2 features: container-timing, import-defer
• 2 status changes:
  • Baseline newly available: media-pseudos, progress-function

What's Changed

• Add container timing feature by @tunetheweb in #4283
• Bump @mdn/browser-compat-data from 8.0.13 to 8.0.14 by @dependabot[bot] in #4314
• Add import-defer feature by @caiolima in #4256

New Contributors

• @caiolima made their first contribution in #4256

Full Changelog: v3.36.0...v3.37.0

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What's New

• 10 features: alpha, anchor-positioning-animations, connection-allowlists, flexbox-flex-wrap-balance, frame-sizing, html-processing-instructions, interaction-contentful-paint, soft-navigations, template-for, and window-drag
• 3 status changes:
  • Discouraged: xslt
  • Baseline newly available: wasm-exnref-exceptions

What's Changed

• Add stats to release artifacts by @ddbeck in #4264
• Add HTML processing instructions feature by @tunetheweb in #4238
• Add window-drag feature by @ddbeck in #4273
• Add alpha() CSS feature by @ddbeck in #4275
• Add flex-wrap: balance feature by @ddbeck in #4274
• xslt: mark as discouraged by @ddbeck in #4271
• Bump @mdn/browser-compat-data from 8.0.12 to 8.0.13 by @dependabot[bot] in #4276
• Add <template for> by @tunetheweb in #4265
• Add anchor positioning animations and transitions feature by @ddbeck in #4270
• Add feature for responsive iframes by @ddbeck in #4077
• Add soft-navigations and interaction-contentful-paint by @tunetheweb in #4237
• Add connection allowlists feature by @ddbeck in #4047

Full Changelog: v3.35.1...v3.36.0

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What's New

• Status changes:
  • Discouraged: fencedframe
  • Baseline newly available: sibling-count
  • Baseline widely available: declarative-shadow-dom

What's Changed

• fencedframe: mark privacy sandbox as discouraged, pending removal by @ddbeck in #4260
• Bump @mdn/browser-compat-data from 8.0.11 to 8.0.12 by @dependabot[bot] in #4258

Full Changelog: v3.35.0...v3.35.1

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What's New

• 3 features: anchor-positioning-position-visibility-plurals, scroll-promises, text-modules
• 1 status change:
  • Baseline newly available: ext-texture-compression-rgtc

What's Changed

• Bump @mdn/browser-compat-data from 8.0.9 to 8.0.10 by @dependabot[bot] in #4228
• Add text-modules feature by @o- in #4226
• Add a discouraged feature for anchors-valid and anchors-visible by @ddbeck in #4227
• Add scroll promises feature by @captainbrosset in #4135
• Update uint8array-base64-hex description by @schalkneethling in #4243
• Bump @mdn/browser-compat-data from 8.0.10 to 8.0.11 by @dependabot[bot] in #4245

Full Changelog: v3.34.3...v3.35.0

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What's New

• Status changes:
  • Baseline widely available: array-fromasync, avif

What's Changed

• Bump @mdn/browser-compat-data from 8.0.8 to 8.0.9 by @dependabot[bot] in #4218

Full Changelog: v3.34.2...v3.34.3

Subscribe to the Upcoming changes announcements thread for news about upcoming releases, such as breaking changes or major features.