BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +3, -0

Support increases (3)

API

  1. api ➞ ShadowRoot ➞ referenceTarget
    Added to Firefox  ➞  3 of 3 engines

CSS

  1. css ➞ types ➞ random Spec link
    Added to Safari  ➞  1 of 3 engines

HTML

  1. html ➞ elements ➞ template ➞ shadowrootreferencetarget
    Added to Firefox  ➞  3 of 3 engines

BCD Metadata Changes: 38

Show all 38 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 (25)

The entries in this section saw support information change since the report on Thursday, 15 January 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 ➞ DocumentPictureInPicture
    Backfilled for Firefox  ➞  2 of 3 engines
  2. api ➞ DocumentPictureInPicture ➞ enter_event
    Backfilled for Firefox  ➞  2 of 3 engines
  3. api ➞ DocumentPictureInPicture ➞ requestWindow
    Backfilled for Firefox  ➞  2 of 3 engines
  4. api ➞ DocumentPictureInPicture ➞ requestWindow ➞ option_preferInitialWindowPlacement Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  5. api ➞ DocumentPictureInPicture ➞ window
    Backfilled for Firefox  ➞  2 of 3 engines
  6. api ➞ DocumentPictureInPictureEvent ➞ DocumentPictureInPictureEvent
    Backfilled for Firefox  ➞  2 of 3 engines
  7. api ➞ DocumentPictureInPictureEvent
    Backfilled for Firefox  ➞  2 of 3 engines
  8. api ➞ DocumentPictureInPictureEvent ➞ window
    Backfilled for Firefox  ➞  2 of 3 engines
  9. api ➞ ShadowRoot ➞ getHTML ➞ escapes_lt_gt_in_attributes
    Backfilled for Chrome  ➞  3 of 3 engines
  10. api ➞ Window ➞ documentPictureInPicture
    Backfilled for Firefox  ➞  2 of 3 engines
  11. api ➞ Document ➞ requestStorageAccess ➞ strict_same_origin_policy Spec link
    Backfilled for Firefox  ➞  2 of 3 engines

CSS

  1. css ➞ at-rules ➞ media ➞ display-mode ➞ picture-in-picture Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  2. css ➞ properties ➞ font-variant-position
    Backfilled for Chrome  ➞  3 of 3 engines
  3. css ➞ properties ➞ font-variant-position ➞ normal Spec link
    Backfilled for Chrome  ➞  3 of 3 engines
  4. css ➞ properties ➞ font-variant-position ➞ sub Spec link
    Backfilled for Chrome  ➞  3 of 3 engines
  5. css ➞ properties ➞ font-variant-position ➞ super Spec link
    Backfilled for Chrome  ➞  3 of 3 engines
  6. css ➞ at-rules ➞ media ➞ display-mode ➞ browser Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  7. css ➞ at-rules ➞ media ➞ display-mode ➞ fullscreen Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  8. css ➞ at-rules ➞ media ➞ display-mode ➞ minimal-ui Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  9. css ➞ at-rules ➞ media ➞ display-mode ➞ standalone Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  10. css ➞ at-rules ➞ media ➞ display-mode ➞ window-controls-overlay Spec link
    Backfilled for Chrome  ➞  1 of 3 engines

HTML

  1. html ➞ elements ➞ input ➞ switch
    Backfilled for Safari  ➞  1 of 3 engines

JAVASCRIPT

  1. javascript ➞ builtins ➞ AsyncFunction ➞ AsyncFunction ➞ enforces_trusted_types Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  2. javascript ➞ builtins ➞ AsyncGeneratorFunction ➞ AsyncGeneratorFunction ➞ enforces_trusted_types Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  3. javascript ➞ builtins ➞ GeneratorFunction ➞ GeneratorFunction ➞ enforces_trusted_types Spec link
    Backfilled for Firefox  ➞  2 of 3 engines

New entries (13)

The entries in this section were not found in BCD on Thursday, 15 January 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 ➞ Document ➞ requestStorageAccess ➞ strict_same_origin_policy
  2. api ➞ ShadowRoot ➞ referenceTarget

CSS

  1. css ➞ at-rules ➞ media ➞ display-mode ➞ browser
  2. css ➞ at-rules ➞ media ➞ display-mode ➞ fullscreen
  3. css ➞ at-rules ➞ media ➞ display-mode ➞ minimal-ui
  4. css ➞ at-rules ➞ media ➞ display-mode ➞ standalone
  5. css ➞ at-rules ➞ media ➞ display-mode ➞ window-controls-overlay
  6. css ➞ types ➞ random

HTML

  1. html ➞ elements ➞ input ➞ switch
  2. html ➞ elements ➞ template ➞ shadowrootreferencetarget

JAVASCRIPT

  1. javascript ➞ builtins ➞ AsyncFunction ➞ AsyncFunction ➞ enforces_trusted_types
  2. javascript ➞ builtins ➞ AsyncGeneratorFunction ➞ AsyncGeneratorFunction ➞ enforces_trusted_types
  3. javascript ➞ builtins ➞ GeneratorFunction ➞ GeneratorFunction ➞ enforces_trusted_types

Removed entries (0)

No features were removed from bcd in this time period