BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +6, -0

Support increases (6)

API

  1. api ➞ GPUDevice ➞ createRenderPipeline ➞ dual-source-blending Spec link
    Added to Firefox  ➞  1 of 3 engines
  2. api ➞ GPUDevice ➞ createRenderPipelineAsync ➞ dual-source-blending Spec link
    Added to Firefox  ➞  1 of 3 engines
  3. api ➞ RTCError ➞ errorDetail ➞ sctp-failure
    Added to Firefox  ➞  3 of 3 engines
  4. api ➞ RTCError ➞ worker_support
    Added to Firefox  ➞  1 of 3 engines
  5. api ➞ RTCErrorEvent ➞ worker_support
    Added to Firefox  ➞  1 of 3 engines

CSS

  1. css ➞ types ➞ progress
    Added to Firefox  ➞  3 of 3 engines

BCD Metadata Changes: 103

Show all 103 changes

Note: The following represent changes to BCD metadata keys in the reported time period. Keys are not implementations, and they don't represent commitments toward implementation, etc. A new key occurring is perhaps a signal that some implementer was serious enough to add the key. Many of the features that are 'removed' are usually just 'moved' or 'renamed', but we don't have great ways to highlight that.

Backfilled entries (76)

The entries in this section saw support information change since the report on Monday, 17 August 2026, but all the supported browser versions given were more than a couple of months old. Typically, these are cases of support information being updated long after the support actually landed in a browser, but nobody ever updated the BCD entry.

API

  1. api ➞ AudioSession
    Backfilled for Firefox  ➞  2 of 3 engines
  2. api ➞ AudioSession ➞ type
    Backfilled for Firefox  ➞  2 of 3 engines
  3. api ➞ ClipboardItem ➞ type_image_svg_xml Spec link
    Backfilled for Safari  ➞  2 of 3 engines
  4. api ➞ Document ➞ startViewTransition ➞ updateCallback_parameter Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  5. api ➞ Element ➞ animate ➞ options_rangeEnd_parameter Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  6. api ➞ Element ➞ animate ➞ options_rangeStart_parameter Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  7. api ➞ Navigator ➞ audioSession
    Backfilled for Firefox  ➞  2 of 3 engines
  8. api ➞ WebTransport ➞ createSendGroup
    Backfilled for Firefox  ➞  2 of 3 engines
  9. api ➞ WebTransport ➞ draining Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  10. api ➞ WebTransport ➞ protocol Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  11. api ➞ WebTransportDatagramDuplexStream ➞ createWritable
    Backfilled for Firefox  ➞  2 of 3 engines
  12. api ➞ WebTransportDatagramDuplexStream ➞ incomingMaxBufferedDatagrams Spec link
    Backfilled for Safari  ➞  2 of 3 engines
  13. api ➞ WebTransportDatagramDuplexStream ➞ outgoingMaxBufferedDatagrams Spec link
    Backfilled for Safari  ➞  2 of 3 engines
  14. api ➞ WebTransportDatagramsWritable
    Backfilled for Firefox  ➞  2 of 3 engines
  15. api ➞ WebTransportDatagramsWritable ➞ sendGroup
    Backfilled for Firefox  ➞  2 of 3 engines
  16. api ➞ WebTransportDatagramsWritable ➞ sendOrder
    Backfilled for Firefox  ➞  2 of 3 engines
  17. api ➞ WebTransportSendGroup
    Backfilled for Firefox  ➞  2 of 3 engines
  18. api ➞ WebTransportSendGroup ➞ getStats
    Backfilled for Firefox  ➞  2 of 3 engines
  19. api ➞ WebTransportSendStream ➞ sendGroup Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  20. api ➞ AudioSession ➞ state
    Backfilled for Firefox  ➞  1 of 3 engines
  21. api ➞ AudioSession ➞ statechange_event
    Backfilled for Firefox  ➞  1 of 3 engines
  22. api ➞ SVGAElement ➞ hash
    Backfilled for Firefox  ➞  1 of 3 engines
  23. api ➞ SVGAElement ➞ host
    Backfilled for Firefox  ➞  1 of 3 engines
  24. api ➞ SVGAElement ➞ hostname
    Backfilled for Firefox  ➞  1 of 3 engines
  25. api ➞ SVGAElement ➞ origin
    Backfilled for Firefox  ➞  1 of 3 engines
  26. api ➞ SVGAElement ➞ password
    Backfilled for Firefox  ➞  1 of 3 engines
  27. api ➞ SVGAElement ➞ pathname
    Backfilled for Firefox  ➞  1 of 3 engines
  28. api ➞ SVGAElement ➞ port
    Backfilled for Firefox  ➞  1 of 3 engines
  29. api ➞ SVGAElement ➞ protocol
    Backfilled for Firefox  ➞  1 of 3 engines
  30. api ➞ SVGAElement ➞ search
    Backfilled for Firefox  ➞  1 of 3 engines
  31. api ➞ SVGAElement ➞ username
    Backfilled for Firefox  ➞  1 of 3 engines
  32. api ➞ WebTransport ➞ exportKeyingMaterial Spec link
    Backfilled for Firefox  ➞  1 of 3 engines

CSS

  1. css ➞ properties ➞ ruby-overhang ➞ spaces Spec link
    Backfilled for Safari  ➞  2 of 3 engines
  2. css ➞ at-rules ➞ supports ➞ named-feature Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  3. css ➞ properties ➞ text-fit ➞ consistent Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  4. css ➞ properties ➞ text-fit ➞ per-line Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  5. css ➞ properties ➞ text-fit ➞ per-line-all Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  6. css ➞ properties ➞ text-fit ➞ percentage Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  7. css ➞ types ➞ color ➞ from_currentcolor Spec link
    Backfilled for Firefox  ➞  3 of 3 engines

JAVASCRIPT

  1. javascript ➞ builtins ➞ AsyncDisposableStack ➞ @@asyncDispose
    Backfilled for Safari  ➞  3 of 3 engines
  2. javascript ➞ builtins ➞ AsyncDisposableStack ➞ AsyncDisposableStack
    Backfilled for Safari  ➞  3 of 3 engines
  3. javascript ➞ builtins ➞ AsyncDisposableStack
    Backfilled for Safari  ➞  3 of 3 engines
  4. javascript ➞ builtins ➞ AsyncDisposableStack ➞ adopt
    Backfilled for Safari  ➞  3 of 3 engines
  5. javascript ➞ builtins ➞ AsyncDisposableStack ➞ defer
    Backfilled for Safari  ➞  3 of 3 engines
  6. javascript ➞ builtins ➞ AsyncDisposableStack ➞ disposeAsync
    Backfilled for Safari  ➞  3 of 3 engines
  7. javascript ➞ builtins ➞ AsyncDisposableStack ➞ disposed
    Backfilled for Safari  ➞  3 of 3 engines
  8. javascript ➞ builtins ➞ AsyncDisposableStack ➞ move
    Backfilled for Safari  ➞  3 of 3 engines
  9. javascript ➞ builtins ➞ AsyncDisposableStack ➞ use
    Backfilled for Safari  ➞  3 of 3 engines
  10. javascript ➞ builtins ➞ AsyncIterator ➞ @@asyncDispose
    Backfilled for Safari  ➞  3 of 3 engines
  11. javascript ➞ builtins ➞ DisposableStack ➞ @@dispose
    Backfilled for Safari  ➞  3 of 3 engines
  12. javascript ➞ builtins ➞ DisposableStack ➞ DisposableStack
    Backfilled for Safari  ➞  3 of 3 engines
  13. javascript ➞ builtins ➞ DisposableStack
    Backfilled for Safari  ➞  3 of 3 engines
  14. javascript ➞ builtins ➞ DisposableStack ➞ adopt
    Backfilled for Safari  ➞  3 of 3 engines
  15. javascript ➞ builtins ➞ DisposableStack ➞ defer
    Backfilled for Safari  ➞  3 of 3 engines
  16. javascript ➞ builtins ➞ DisposableStack ➞ dispose
    Backfilled for Safari  ➞  3 of 3 engines
  17. javascript ➞ builtins ➞ DisposableStack ➞ disposed
    Backfilled for Safari  ➞  3 of 3 engines
  18. javascript ➞ builtins ➞ DisposableStack ➞ move
    Backfilled for Safari  ➞  3 of 3 engines
  19. javascript ➞ builtins ➞ DisposableStack ➞ use
    Backfilled for Safari  ➞  3 of 3 engines
  20. javascript ➞ builtins ➞ Iterator ➞ @@dispose
    Backfilled for Safari  ➞  3 of 3 engines
  21. javascript ➞ builtins ➞ SuppressedError ➞ SuppressedError
    Backfilled for Safari  ➞  3 of 3 engines
  22. javascript ➞ builtins ➞ SuppressedError
    Backfilled for Safari  ➞  3 of 3 engines
  23. javascript ➞ builtins ➞ SuppressedError ➞ error
    Backfilled for Safari  ➞  3 of 3 engines
  24. javascript ➞ builtins ➞ SuppressedError ➞ suppressed
    Backfilled for Safari  ➞  3 of 3 engines
  25. javascript ➞ builtins ➞ Symbol ➞ asyncDispose
    Backfilled for Safari  ➞  3 of 3 engines
  26. javascript ➞ builtins ➞ Symbol ➞ dispose
    Backfilled for Safari  ➞  3 of 3 engines
  27. javascript ➞ statements ➞ await_using
    Backfilled for Safari  ➞  3 of 3 engines
  28. javascript ➞ statements ➞ using
    Backfilled for Safari  ➞  3 of 3 engines
  29. javascript ➞ regular_expressions ➞ buffer_boundary_assertion Spec link
    Backfilled for Firefox  ➞  1 of 3 engines

WEBASSEMBLY

  1. webassembly ➞ multiMemory
    Backfilled for Safari  ➞  3 of 3 engines
  2. webassembly ➞ relaxed-SIMD Spec link
    Backfilled for Safari  ➞  3 of 3 engines

WEBDRIVER

  1. webdriver ➞ bidi ➞ script ➞ getRealms ➞ type_parameter ➞ window Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  2. webdriver ➞ bidi ➞ script ➞ getRealms ➞ type_parameter ➞ worker Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  3. webdriver ➞ bidi ➞ script ➞ realmCreated_event ➞ owners_parameter Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  4. webdriver ➞ bidi ➞ script ➞ getRealms ➞ type_parameter ➞ worklet Spec link
    Backfilled for Chrome  ➞  1 of 3 engines

HTTP

  1. http ➞ headers ➞ Permissions-Policy ➞ clipboard-read
    Backfilled for Chrome  ➞  1 of 3 engines
  2. http ➞ headers ➞ Permissions-Policy ➞ clipboard-write
    Backfilled for Chrome  ➞  1 of 3 engines

New entries (26)

The entries in this section were not found in BCD on Monday, 17 August 2026, but are now present. These usually do not have any support information attached to them, and often have no corresponding MDN page. Sometimes, entries that appear here also appear in the next section (“Removed BCD entries”) because of a Working Group deciding on a rename.

API

  1. api ➞ AudioSession ➞ state
  2. api ➞ AudioSession ➞ statechange_event
  3. api ➞ RTCError ➞ errorDetail ➞ sctp-failure
  4. api ➞ RTCError ➞ worker_support
  5. api ➞ RTCErrorEvent ➞ worker_support
  6. api ➞ SVGAElement ➞ hash
  7. api ➞ SVGAElement ➞ host
  8. api ➞ SVGAElement ➞ hostname
  9. api ➞ SVGAElement ➞ origin
  10. api ➞ SVGAElement ➞ password
  11. api ➞ SVGAElement ➞ pathname
  12. api ➞ SVGAElement ➞ port
  13. api ➞ SVGAElement ➞ protocol
  14. api ➞ SVGAElement ➞ search
  15. api ➞ SVGAElement ➞ username
  16. api ➞ WebTransport ➞ exportKeyingMaterial

CSS

  1. css ➞ at-rules ➞ supports ➞ named-feature
  2. css ➞ properties ➞ text-fit ➞ consistent
  3. css ➞ properties ➞ text-fit ➞ per-line
  4. css ➞ properties ➞ text-fit ➞ per-line-all
  5. css ➞ properties ➞ text-fit ➞ percentage
  6. css ➞ types ➞ color ➞ from_currentcolor

HTTP

  1. http ➞ headers ➞ Permissions-Policy ➞ clipboard-read
  2. http ➞ headers ➞ Permissions-Policy ➞ clipboard-write

JAVASCRIPT

  1. javascript ➞ regular_expressions ➞ buffer_boundary_assertion

WEBDRIVER

  1. webdriver ➞ bidi ➞ script ➞ getRealms ➞ type_parameter ➞ worklet

Removed entries (1)

The entries in this section were found in BCD on Monday, 17 August 2026, but are no longer present. The reasons for this removal can be anything from an experimental proposal that was never supported to a property or value being renamed to something else.

API

  1. api ➞ Window ➞ DOMContentLoaded_event