BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +3, -0

Support increases (3)

API

  1. api ➞ Element ➞ requestFullscreen ➞ options_parameter Spec link
    Added to Firefox  ➞  3 of 3 engines
  2. api ➞ Element ➞ requestFullscreen ➞ options_parameter ➞ keyboardLock_option
    Added to Firefox,Safari  ➞  2 of 3 engines
  3. api ➞ SharedWorker ➞ SharedWorker ➞ options_extendedLifetime_parameter Spec link
    Added to Chrome  ➞  1 of 3 engines

BCD Metadata Changes: 89

Show all 89 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 (33)

The entries in this section saw support information change since the report on Friday, 24 April 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.

CSS

  1. css ➞ types ➞ color ➞ contrast-color
    Backfilled for Chrome  ➞  3 of 3 engines
  2. css ➞ properties ➞ accent-color ➞ transparent Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  3. css ➞ properties ➞ shape-outside ➞ rect
    Backfilled for Firefox  ➞  2 of 3 engines
  4. css ➞ properties ➞ stop-color ➞ transparent Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  5. css ➞ types ➞ attr ➞ fallback Spec link
    Backfilled for Firefox  ➞  3 of 3 engines

API

  1. api ➞ Element ➞ requestFullscreen ➞ options_parameter ➞ navigationUI_option Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  2. api ➞ Element ➞ requestFullscreen ➞ options_parameter ➞ screen_option Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  3. api ➞ GPU ➞ requestAdapter ➞ options_featureLevel Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  4. api ➞ Request ➞ Request ➞ options_parameter Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  5. api ➞ Request ➞ Request ➞ options_parameter ➞ attributionReporting Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  6. api ➞ Request ➞ Request ➞ options_parameter ➞ body Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  7. api ➞ Request ➞ Request ➞ options_parameter ➞ body ➞ accepts_readablestream Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  8. api ➞ Request ➞ Request ➞ options_parameter ➞ browsingTopics
    Backfilled for Chrome  ➞  1 of 3 engines
  9. api ➞ Request ➞ Request ➞ options_parameter ➞ duplex Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  10. api ➞ Request ➞ Request ➞ options_parameter ➞ keepalive Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  11. api ➞ Request ➞ Request ➞ options_parameter ➞ priority Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  12. api ➞ Request ➞ Request ➞ options_parameter ➞ privateToken Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  13. api ➞ Request ➞ Request ➞ options_parameter ➞ referrer Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  14. api ➞ Request ➞ Request ➞ options_parameter ➞ targetAddressSpace Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  15. api ➞ XRSession ➞ visibilitymaskchange_event Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  16. api ➞ fetch ➞ options_parameter Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  17. api ➞ fetch ➞ options_parameter ➞ attributionReporting Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  18. api ➞ fetch ➞ options_parameter ➞ body Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  19. api ➞ fetch ➞ options_parameter ➞ body ➞ accepts_readablestream Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  20. api ➞ fetch ➞ options_parameter ➞ browsingTopics
    Backfilled for Chrome  ➞  1 of 3 engines
  21. api ➞ fetch ➞ options_parameter ➞ duplex Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  22. api ➞ fetch ➞ options_parameter ➞ keepalive
    Backfilled for Firefox  ➞  3 of 3 engines
  23. api ➞ fetch ➞ options_parameter ➞ priority
    Backfilled for Firefox  ➞  3 of 3 engines
  24. api ➞ fetch ➞ options_parameter ➞ privateToken Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  25. api ➞ fetch ➞ options_parameter ➞ referrerPolicy
    Backfilled for Firefox  ➞  3 of 3 engines
  26. api ➞ fetch ➞ options_parameter ➞ signal
    Backfilled for Firefox  ➞  3 of 3 engines
  27. api ➞ fetch ➞ options_parameter ➞ targetAddressSpace Spec link
    Backfilled for Chrome  ➞  1 of 3 engines

HTML

  1. html ➞ elements ➞ audio ➞ autoplay Spec link
    Backfilled for Firefox  ➞  3 of 3 engines

New entries (35)

The entries in this section were not found in BCD on Friday, 24 April 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 ➞ Element ➞ requestFullscreen ➞ options_parameter
  2. api ➞ Element ➞ requestFullscreen ➞ options_parameter ➞ keyboardLock_option
  3. api ➞ Element ➞ requestFullscreen ➞ options_parameter ➞ navigationUI_option
  4. api ➞ Element ➞ requestFullscreen ➞ options_parameter ➞ screen_option
  5. api ➞ GPU ➞ requestAdapter ➞ options_featureLevel
  6. api ➞ Request ➞ Request ➞ options_parameter
  7. api ➞ Request ➞ Request ➞ options_parameter ➞ attributionReporting
  8. api ➞ Request ➞ Request ➞ options_parameter ➞ body
  9. api ➞ Request ➞ Request ➞ options_parameter ➞ body ➞ accepts_readablestream
  10. api ➞ Request ➞ Request ➞ options_parameter ➞ browsingTopics
  11. api ➞ Request ➞ Request ➞ options_parameter ➞ duplex
  12. api ➞ Request ➞ Request ➞ options_parameter ➞ keepalive
  13. api ➞ Request ➞ Request ➞ options_parameter ➞ priority
  14. api ➞ Request ➞ Request ➞ options_parameter ➞ privateToken
  15. api ➞ Request ➞ Request ➞ options_parameter ➞ referrer
  16. api ➞ Request ➞ Request ➞ options_parameter ➞ targetAddressSpace
  17. api ➞ SharedWorker ➞ SharedWorker ➞ options_extendedLifetime_parameter
  18. api ➞ XRSession ➞ visibilitymaskchange_event
  19. api ➞ fetch ➞ options_parameter
  20. api ➞ fetch ➞ options_parameter ➞ attributionReporting
  21. api ➞ fetch ➞ options_parameter ➞ body
  22. api ➞ fetch ➞ options_parameter ➞ body ➞ accepts_readablestream
  23. api ➞ fetch ➞ options_parameter ➞ browsingTopics
  24. api ➞ fetch ➞ options_parameter ➞ duplex
  25. api ➞ fetch ➞ options_parameter ➞ keepalive
  26. api ➞ fetch ➞ options_parameter ➞ priority
  27. api ➞ fetch ➞ options_parameter ➞ privateToken
  28. api ➞ fetch ➞ options_parameter ➞ referrerPolicy
  29. api ➞ fetch ➞ options_parameter ➞ signal
  30. api ➞ fetch ➞ options_parameter ➞ targetAddressSpace

CSS

  1. css ➞ properties ➞ accent-color ➞ transparent
  2. css ➞ properties ➞ shape-outside ➞ rect
  3. css ➞ properties ➞ stop-color ➞ transparent
  4. css ➞ types ➞ attr ➞ fallback

HTML

  1. html ➞ elements ➞ audio ➞ autoplay

Removed entries (21)

The entries in this section were found in BCD on Friday, 24 April 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 ➞ Element ➞ requestFullscreen ➞ options_navigationUI_parameter
  2. api ➞ Element ➞ requestFullscreen ➞ options_screen_parameter
  3. api ➞ Request ➞ Request ➞ init_attributionReporting_parameter
  4. api ➞ Request ➞ Request ➞ init_browsingTopics_parameter
  5. api ➞ Request ➞ Request ➞ init_duplex_parameter
  6. api ➞ Request ➞ Request ➞ init_keepalive_parameter
  7. api ➞ Request ➞ Request ➞ init_priority_parameter
  8. api ➞ Request ➞ Request ➞ init_privateToken_parameter
  9. api ➞ Request ➞ Request ➞ init_referrer_parameter
  10. api ➞ Request ➞ Request ➞ init_targetAddressSpace_parameter
  11. api ➞ Request ➞ Request ➞ request_body_readablestream
  12. api ➞ fetch ➞ body_readablestream
  13. api ➞ fetch ➞ init_attributionReporting_parameter
  14. api ➞ fetch ➞ init_browsingTopics_parameter
  15. api ➞ fetch ➞ init_duplex_parameter
  16. api ➞ fetch ➞ init_keepalive_parameter
  17. api ➞ fetch ➞ init_priority_parameter
  18. api ➞ fetch ➞ init_privateToken_parameter
  19. api ➞ fetch ➞ init_referrerPolicy_parameter
  20. api ➞ fetch ➞ init_signal_parameter
  21. api ➞ fetch ➞ init_targetAddressSpace_parameter