BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +9, -0

Support increases (9)

API

  1. api ➞ GPUTexture ➞ createView ➞ descriptor_usage_parameter ➞ transient_attachment Spec link
    Added to Firefox  ➞  2 of 3 engines
  2. api ➞ GPUTexture ➞ usage ➞ transient_attachment Spec link
    Added to Firefox  ➞  2 of 3 engines

CSS

  1. css ➞ at-rules ➞ supports ➞ named-feature ➞ single-axis-scroll-container Spec link
    Added to Chrome  ➞  1 of 3 engines

WEBASSEMBLY

  1. webassembly ➞ api ➞ SuspendError ➞ SuspendError
    Added to Safari  ➞  3 of 3 engines
  2. webassembly ➞ api ➞ SuspendError
    Added to Safari  ➞  3 of 3 engines
  3. webassembly ➞ api ➞ Suspending ➞ Suspending
    Added to Safari  ➞  3 of 3 engines
  4. webassembly ➞ api ➞ Suspending
    Added to Safari  ➞  3 of 3 engines
  5. webassembly ➞ api ➞ promising_static
    Added to Safari  ➞  3 of 3 engines

WEBDRIVER

  1. webdriver ➞ bidi ➞ browsingContext ➞ captureScreenshot ➞ imageSize_parameter Spec link
    Added to Firefox  ➞  1 of 3 engines

BCD Metadata Changes: 112

Show all 112 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 (52)

The entries in this section saw support information change since the report on Monday, 14 September 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 ➞ ClipboardItem ➞ type_web Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  2. api ➞ GPUTexture ➞ createView ➞ descriptor_usage_parameter Spec link
    Backfilled for Firefox  ➞  1 of 3 engines
  3. api ➞ Request ➞ duplex
    Backfilled for Safari  ➞  2 of 3 engines
  4. api ➞ CSSMediaRule ➞ matches Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  5. api ➞ CSSSupportsRule ➞ matches Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  6. api ➞ IntersectionObserver ➞ IntersectionObserver ➞ options_trackVisibility_parameter Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  7. api ➞ NotRestoredReasonDetails ➞ reason ➞ unload-listener Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  8. api ➞ NotRestoredReasonDetails ➞ reason ➞ websocket Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  9. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter Spec link
    Backfilled for Firefox  ➞  1 of 3 engines
  10. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter ➞ options_clipped_parameter Spec link
    Backfilled for Firefox  ➞  1 of 3 engines
  11. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter ➞ options_fill_parameter Spec link
    Backfilled for Firefox  ➞  1 of 3 engines
  12. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter ➞ options_markers_parameter Spec link
    Backfilled for Firefox  ➞  1 of 3 engines
  13. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter ➞ options_stroke_parameter Spec link
    Backfilled for Firefox  ➞  1 of 3 engines

CSS

  1. css ➞ at-rules ➞ supports ➞ named-feature Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  2. css ➞ properties ➞ break-after ➞ paged_context ➞ recto Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  3. css ➞ properties ➞ break-before ➞ paged_context ➞ recto Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  4. css ➞ selectors ➞ attribute ➞ case_sensitive_modifier Spec link
    Backfilled for Safari  ➞  2 of 3 engines
  5. css ➞ at-rules ➞ supports ➞ named-feature ➞ anchor-position-follows-transforms Spec link
    Backfilled for Firefox  ➞  2 of 3 engines
  6. css ➞ properties ➞ background-blend-mode ➞ color Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  7. css ➞ properties ➞ background-blend-mode ➞ color-burn Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  8. css ➞ properties ➞ background-blend-mode ➞ color-dodge Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  9. css ➞ properties ➞ background-blend-mode ➞ darken Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  10. css ➞ properties ➞ background-blend-mode ➞ difference Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  11. css ➞ properties ➞ background-blend-mode ➞ exclusion Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  12. css ➞ properties ➞ background-blend-mode ➞ hard-light Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  13. css ➞ properties ➞ background-blend-mode ➞ hue Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  14. css ➞ properties ➞ background-blend-mode ➞ lighten Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  15. css ➞ properties ➞ background-blend-mode ➞ luminosity Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  16. css ➞ properties ➞ background-blend-mode ➞ multiply Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  17. css ➞ properties ➞ background-blend-mode ➞ normal Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  18. css ➞ properties ➞ background-blend-mode ➞ overlay Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  19. css ➞ properties ➞ background-blend-mode ➞ saturation Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  20. css ➞ properties ➞ background-blend-mode ➞ screen Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  21. css ➞ properties ➞ background-blend-mode ➞ soft-light Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  22. css ➞ properties ➞ white-space ➞ discard-after Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  23. css ➞ properties ➞ white-space ➞ discard-before Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  24. css ➞ properties ➞ white-space ➞ discard-inner Spec link
    Backfilled for Safari  ➞  1 of 3 engines
  25. css ➞ properties ➞ white-space ➞ none Spec link
    Backfilled for Safari  ➞  1 of 3 engines

JAVASCRIPT

  1. javascript ➞ builtins ➞ String ➞ trimEnd
    Backfilled for Firefox  ➞  3 of 3 engines
  2. javascript ➞ builtins ➞ String ➞ trimStart
    Backfilled for Firefox  ➞  3 of 3 engines
  3. javascript ➞ builtins ➞ Temporal ➞ Instant ➞ Instant
    Backfilled for Chrome  ➞  3 of 3 engines
  4. javascript ➞ builtins ➞ Temporal ➞ PlainDate ➞ PlainDate
    Backfilled for Chrome  ➞  3 of 3 engines
  5. javascript ➞ builtins ➞ Temporal ➞ PlainDateTime ➞ PlainDateTime
    Backfilled for Chrome  ➞  3 of 3 engines
  6. javascript ➞ builtins ➞ Temporal ➞ PlainMonthDay ➞ PlainMonthDay
    Backfilled for Chrome  ➞  3 of 3 engines
  7. javascript ➞ builtins ➞ Temporal ➞ PlainYearMonth ➞ PlainYearMonth
    Backfilled for Chrome  ➞  3 of 3 engines
  8. javascript ➞ builtins ➞ Temporal ➞ ZonedDateTime ➞ ZonedDateTime
    Backfilled for Chrome  ➞  3 of 3 engines
  9. javascript ➞ builtins ➞ String ➞ trimLeft
    Backfilled for Firefox  ➞  3 of 3 engines
  10. javascript ➞ builtins ➞ String ➞ trimRight
    Backfilled for Firefox  ➞  3 of 3 engines
  11. javascript ➞ operators ➞ import ➞ defer
    Backfilled for Safari  ➞  1 of 3 engines
  12. javascript ➞ operators ➞ import ➞ import_source
    Backfilled for Firefox  ➞  1 of 3 engines

SVG

  1. svg ➞ global_attributes ➞ transform ➞ svg_root
    Backfilled for Firefox  ➞  2 of 3 engines

HTTP

  1. http ➞ headers ➞ Permissions-Policy ➞ unload
    Backfilled for Chrome  ➞  1 of 3 engines

New entries (38)

The entries in this section were not found in BCD on Monday, 14 September 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 ➞ CSSMediaRule ➞ matches
  2. api ➞ CSSSupportsRule ➞ matches
  3. api ➞ IntersectionObserver ➞ IntersectionObserver ➞ options_trackVisibility_parameter
  4. api ➞ NotRestoredReasonDetails ➞ reason ➞ unload-listener
  5. api ➞ NotRestoredReasonDetails ➞ reason ➞ websocket
  6. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter
  7. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter ➞ options_clipped_parameter
  8. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter ➞ options_fill_parameter
  9. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter ➞ options_markers_parameter
  10. api ➞ SVGGraphicsElement ➞ getBBox ➞ options_parameter ➞ options_stroke_parameter

CSS

  1. css ➞ at-rules ➞ supports ➞ named-feature ➞ anchor-position-follows-transforms
  2. css ➞ at-rules ➞ supports ➞ named-feature ➞ single-axis-scroll-container
  3. css ➞ properties ➞ background-blend-mode ➞ color
  4. css ➞ properties ➞ background-blend-mode ➞ color-burn
  5. css ➞ properties ➞ background-blend-mode ➞ color-dodge
  6. css ➞ properties ➞ background-blend-mode ➞ darken
  7. css ➞ properties ➞ background-blend-mode ➞ difference
  8. css ➞ properties ➞ background-blend-mode ➞ exclusion
  9. css ➞ properties ➞ background-blend-mode ➞ hard-light
  10. css ➞ properties ➞ background-blend-mode ➞ hue
  11. css ➞ properties ➞ background-blend-mode ➞ lighten
  12. css ➞ properties ➞ background-blend-mode ➞ luminosity
  13. css ➞ properties ➞ background-blend-mode ➞ multiply
  14. css ➞ properties ➞ background-blend-mode ➞ normal
  15. css ➞ properties ➞ background-blend-mode ➞ overlay
  16. css ➞ properties ➞ background-blend-mode ➞ saturation
  17. css ➞ properties ➞ background-blend-mode ➞ screen
  18. css ➞ properties ➞ background-blend-mode ➞ soft-light
  19. css ➞ properties ➞ white-space ➞ discard-after
  20. css ➞ properties ➞ white-space ➞ discard-before
  21. css ➞ properties ➞ white-space ➞ discard-inner
  22. css ➞ properties ➞ white-space ➞ none

HTTP

  1. http ➞ headers ➞ Permissions-Policy ➞ unload

JAVASCRIPT

  1. javascript ➞ builtins ➞ String ➞ trimLeft
  2. javascript ➞ builtins ➞ String ➞ trimRight
  3. javascript ➞ operators ➞ import ➞ defer
  4. javascript ➞ operators ➞ import ➞ import_source

WEBDRIVER

  1. webdriver ➞ bidi ➞ browsingContext ➞ captureScreenshot ➞ imageSize_parameter

Removed entries (22)

The entries in this section were found in BCD on Monday, 14 September 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 ➞ HTMLInstallElement ➞ initialPermissionStatus
  2. api ➞ HTMLInstallElement ➞ permissionStatus

CSS

  1. css ➞ properties ➞ -moz-user-focus
  2. css ➞ properties ➞ -webkit-mask-repeat-x
  3. css ➞ properties ➞ -webkit-mask-repeat-y
  4. css ➞ properties ➞ background-image ➞ image-rect
  5. css ➞ properties ➞ caption-side ➞ left
  6. css ➞ properties ➞ caption-side ➞ right
  7. css ➞ properties ➞ font-variant ➞ greek_accented_characters
  8. css ➞ properties ➞ font-variant ➞ uppercase_eszett
  9. css ➞ properties ➞ text-autospace ➞ punctuation
  10. css ➞ properties ➞ text-autospace ➞ replace
  11. css ➞ selectors ➞ -moz-broken
  12. css ➞ selectors ➞ closed
  13. css ➞ selectors ➞ empty ➞ matches_whitespace
  14. css ➞ selectors ➞ scroll-button ➞ next
  15. css ➞ selectors ➞ scroll-button ➞ prev
  16. css ➞ types ➞ attr ➞ type_function ➞ url
  17. css ➞ types ➞ basic-shape ➞ path ➞ shape-outside
  18. css ➞ types ➞ image ➞ paint ➞ additional_parameters
  19. css ➞ types ➞ param ➞ url
  20. css ➞ types ➞ param ➞ url_fragments