BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +35, -0

Support increases (35)

API

  1. api ➞ SVGAElement ➞ download Spec link
    Added to Chrome  ➞  2 of 3 engines
  2. api ➞ SVGScriptElement ➞ async
    Added to Chrome  ➞  2 of 3 engines
  3. api ➞ CSSStyleRule ➞ style ➞ returns_CSSStyleProperties Spec link
    Added to Firefox,Safari  ➞  2 of 3 engines
  4. api ➞ Document ➞ activeViewTransition Spec link
    Added to Chrome  ➞  1 of 3 engines
  5. api ➞ HTMLElement ➞ style ➞ returns_CSSStyleProperties Spec link
    Added to Firefox,Safari  ➞  2 of 3 engines
  6. api ➞ MathMLElement ➞ style ➞ returns_CSSStyleProperties Spec link
    Added to Firefox,Safari  ➞  2 of 3 engines
  7. api ➞ SVGElement ➞ style ➞ returns_CSSStyleProperties Spec link
    Added to Firefox,Safari  ➞  2 of 3 engines
  8. api ➞ Window ➞ getComputedStyle ➞ returns_CSSStyleProperties Spec link
    Added to Firefox,Safari  ➞  2 of 3 engines

CSS

  1. css ➞ at-rules ➞ position-try
    Added to Safari  ➞  2 of 3 engines
  2. css ➞ properties ➞ interest-delay Spec link
    Added to Chrome  ➞  1 of 3 engines
  3. css ➞ properties ➞ interest-delay ➞ normal Spec link
    Added to Chrome  ➞  1 of 3 engines
  4. css ➞ properties ➞ interest-delay-end Spec link
    Added to Chrome  ➞  1 of 3 engines
  5. css ➞ properties ➞ interest-delay-end ➞ normal Spec link
    Added to Chrome  ➞  1 of 3 engines
  6. css ➞ properties ➞ interest-delay-start Spec link
    Added to Chrome  ➞  1 of 3 engines
  7. css ➞ properties ➞ interest-delay-start ➞ normal Spec link
    Added to Chrome  ➞  1 of 3 engines
  8. css ➞ selectors ➞ interest-source Spec link
    Added to Chrome  ➞  1 of 3 engines
  9. css ➞ selectors ➞ interest-target Spec link
    Added to Chrome  ➞  1 of 3 engines
  10. css ➞ selectors ➞ target-after Spec link
    Added to Chrome  ➞  1 of 3 engines
  11. css ➞ selectors ➞ target-before Spec link
    Added to Chrome  ➞  1 of 3 engines

HTML

  1. html ➞ elements ➞ iframe ➞ cross-origin-top-navigation-by-user-activation
    Added to Firefox  ➞  3 of 3 engines

WEBDRIVER

  1. webdriver ➞ bidi ➞ browsingContext ➞ downloadEnd_event Spec link
    Added to Firefox  ➞  2 of 3 engines
  2. webdriver ➞ bidi ➞ browsingContext ➞ downloadEnd_event ➞ context_parameter Spec link
    Added to Firefox  ➞  2 of 3 engines
  3. webdriver ➞ bidi ➞ browsingContext ➞ downloadEnd_event ➞ filepath_parameter Spec link
    Added to Firefox  ➞  2 of 3 engines
  4. webdriver ➞ bidi ➞ browsingContext ➞ downloadEnd_event ➞ navigation_parameter Spec link
    Added to Firefox  ➞  2 of 3 engines
  5. webdriver ➞ bidi ➞ browsingContext ➞ downloadEnd_event ➞ status_parameter Spec link
    Added to Firefox  ➞  2 of 3 engines
  6. webdriver ➞ bidi ➞ browsingContext ➞ downloadEnd_event ➞ timestamp_parameter Spec link
    Added to Firefox  ➞  2 of 3 engines
  7. webdriver ➞ bidi ➞ browsingContext ➞ downloadEnd_event ➞ url_parameter Spec link
    Added to Firefox  ➞  2 of 3 engines
  8. webdriver ➞ bidi ➞ browser ➞ setDownloadBehavior Spec link
    Added to Chrome  ➞  1 of 3 engines
  9. webdriver ➞ bidi ➞ browser ➞ setDownloadBehavior ➞ downloadBehavior_parameter Spec link
    Added to Chrome  ➞  1 of 3 engines
  10. webdriver ➞ bidi ➞ browser ➞ setDownloadBehavior ➞ userContexts_parameter Spec link
    Added to Chrome  ➞  1 of 3 engines
  11. webdriver ➞ bidi ➞ emulation ➞ setLocaleOverride ➞ locale_parameter ➞ sets_navigator_language
    Added to Chrome  ➞  1 of 3 engines
  12. webdriver ➞ bidi ➞ emulation ➞ setUserAgentOverride Spec link
    Added to Firefox,Chrome  ➞  2 of 3 engines
  13. webdriver ➞ bidi ➞ emulation ➞ setUserAgentOverride ➞ contexts_parameter Spec link
    Added to Firefox,Chrome  ➞  2 of 3 engines
  14. webdriver ➞ bidi ➞ emulation ➞ setUserAgentOverride ➞ userAgent_parameter Spec link
    Added to Firefox,Chrome  ➞  2 of 3 engines
  15. webdriver ➞ bidi ➞ emulation ➞ setUserAgentOverride ➞ userContexts_parameter Spec link
    Added to Firefox,Chrome  ➞  2 of 3 engines

BCD Metadata Changes: 118

Show all 118 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 (48)

The entries in this section saw support information change since the report on Friday, 26 September 2025, 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 ➞ PerformancePaintTiming ➞ first-contentful-paint
    Backfilled for Chrome  ➞  3 of 3 engines
  2. api ➞ PerformancePaintTiming ➞ first-paint
    Backfilled for Chrome  ➞  1 of 3 engines
  3. api ➞ Element ➞ scrollIntoView ➞ options_parameter ➞ block_option Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  4. api ➞ Element ➞ scrollIntoView ➞ options_parameter ➞ container_option Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  5. api ➞ Element ➞ scrollIntoView ➞ options_parameter ➞ inline_option Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  6. api ➞ HTMLCanvasElement ➞ getContext ➞ 2d_context ➞ options_colorType_parameter Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  7. api ➞ NavigationPrecommitController Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  8. api ➞ NavigationPrecommitController ➞ redirect Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  9. api ➞ NavigationTransition ➞ committed Spec link
    Backfilled for Chrome  ➞  1 of 3 engines

CSS

  1. css ➞ properties ➞ background-repeat-x Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  2. css ➞ properties ➞ background-repeat-y Spec link
    Backfilled for Chrome  ➞  2 of 3 engines
  3. css ➞ properties ➞ container-type ➞ weak_containment Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  4. css ➞ types ➞ mod ➞ mixed_type_parameters Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  5. css ➞ types ➞ rem ➞ mixed_type_parameters Spec link
    Backfilled for Firefox  ➞  3 of 3 engines
  6. css ➞ types ➞ round ➞ mixed_type_parameters Spec link
    Backfilled for Firefox  ➞  3 of 3 engines

WEBASSEMBLY

  1. webassembly ➞ api ➞ JSTag_static Spec link
    Backfilled for Firefox  ➞  2 of 3 engines

WEBDRIVER

  1. webdriver ➞ bidi ➞ bluetooth Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  2. webdriver ➞ bidi ➞ bluetooth ➞ disableSimulation Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  3. webdriver ➞ bidi ➞ bluetooth ➞ handleRequestDevicePrompt Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  4. webdriver ➞ bidi ➞ bluetooth ➞ simulateAdapter Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  5. webdriver ➞ bidi ➞ bluetooth ➞ simulateAdvertisement Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  6. webdriver ➞ bidi ➞ bluetooth ➞ simulateCharacteristic Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  7. webdriver ➞ bidi ➞ bluetooth ➞ simulateCharacteristicResponse Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  8. webdriver ➞ bidi ➞ bluetooth ➞ simulateDescriptor Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  9. webdriver ➞ bidi ➞ bluetooth ➞ simulateDescriptorResponse Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  10. webdriver ➞ bidi ➞ bluetooth ➞ simulateGattConnectionResponse Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  11. webdriver ➞ bidi ➞ bluetooth ➞ simulateGattDisconnection Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  12. webdriver ➞ bidi ➞ bluetooth ➞ simulatePreconnectedPeripheral Spec link
    Backfilled for Chrome  ➞  1 of 3 engines
  13. webdriver ➞ bidi ➞ bluetooth ➞ simulateService Spec link
    Backfilled for Chrome  ➞  1 of 3 engines

WEBEXTENSIONS

  1. webextensions ➞ api ➞ sidePanel ➞ GetPanelOptions
    Backfilled for Chrome  ➞  1 of 3 engines
  2. webextensions ➞ api ➞ sidePanel ➞ OpenOptions
    Backfilled for Chrome  ➞  1 of 3 engines
  3. webextensions ➞ api ➞ sidePanel ➞ PanelBehavior
    Backfilled for Chrome  ➞  1 of 3 engines
  4. webextensions ➞ api ➞ sidePanel ➞ PanelLayout
    Backfilled for Chrome  ➞  1 of 3 engines
  5. webextensions ➞ api ➞ sidePanel ➞ PanelOpenedInfo
    Backfilled for Chrome  ➞  1 of 3 engines
  6. webextensions ➞ api ➞ sidePanel ➞ PanelOptions
    Backfilled for Chrome  ➞  1 of 3 engines
  7. webextensions ➞ api ➞ sidePanel ➞ Side
    Backfilled for Chrome  ➞  1 of 3 engines
  8. webextensions ➞ api ➞ sidePanel ➞ SidePanel
    Backfilled for Chrome  ➞  1 of 3 engines
  9. webextensions ➞ api ➞ sidePanel
    Backfilled for Chrome  ➞  1 of 3 engines
  10. webextensions ➞ api ➞ sidePanel ➞ getLayout
    Backfilled for Chrome  ➞  1 of 3 engines
  11. webextensions ➞ api ➞ sidePanel ➞ getOptions
    Backfilled for Chrome  ➞  1 of 3 engines
  12. webextensions ➞ api ➞ sidePanel ➞ getPanelBehavior
    Backfilled for Chrome  ➞  1 of 3 engines
  13. webextensions ➞ api ➞ sidePanel ➞ onOpened
    Backfilled for Chrome  ➞  1 of 3 engines
  14. webextensions ➞ api ➞ sidePanel ➞ open
    Backfilled for Chrome  ➞  1 of 3 engines
  15. webextensions ➞ api ➞ sidePanel ➞ setOptions
    Backfilled for Chrome  ➞  1 of 3 engines
  16. webextensions ➞ api ➞ sidePanel ➞ setPanelBehavior
    Backfilled for Chrome  ➞  1 of 3 engines
  17. webextensions ➞ manifest ➞ permissions ➞ sidePanel
    Backfilled for Chrome  ➞  1 of 3 engines
  18. webextensions ➞ manifest ➞ side_panel
    Backfilled for Chrome  ➞  1 of 3 engines
  19. webextensions ➞ manifest ➞ side_panel ➞ default_path
    Backfilled for Chrome  ➞  1 of 3 engines

New entries (69)

The entries in this section were not found in BCD on Friday, 26 September 2025, 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 ➞ CSSStyleRule ➞ style ➞ returns_CSSStyleProperties
  2. api ➞ Document ➞ activeViewTransition
  3. api ➞ Element ➞ scrollIntoView ➞ options_parameter ➞ block_option
  4. api ➞ Element ➞ scrollIntoView ➞ options_parameter ➞ container_option
  5. api ➞ Element ➞ scrollIntoView ➞ options_parameter ➞ inline_option
  6. api ➞ HTMLCanvasElement ➞ getContext ➞ 2d_context ➞ options_colorType_parameter
  7. api ➞ HTMLElement ➞ style ➞ returns_CSSStyleProperties
  8. api ➞ MathMLElement ➞ style ➞ returns_CSSStyleProperties
  9. api ➞ NavigationPrecommitController
  10. api ➞ NavigationPrecommitController ➞ redirect
  11. api ➞ NavigationTransition ➞ committed
  12. api ➞ SVGElement ➞ style ➞ returns_CSSStyleProperties
  13. api ➞ Window ➞ getComputedStyle ➞ returns_CSSStyleProperties

CSS

  1. css ➞ properties ➞ container-type ➞ weak_containment
  2. css ➞ properties ➞ interest-delay
  3. css ➞ properties ➞ interest-delay ➞ normal
  4. css ➞ properties ➞ interest-delay-end
  5. css ➞ properties ➞ interest-delay-end ➞ normal
  6. css ➞ properties ➞ interest-delay-start
  7. css ➞ properties ➞ interest-delay-start ➞ normal
  8. css ➞ selectors ➞ interest-source
  9. css ➞ selectors ➞ interest-target
  10. css ➞ selectors ➞ target-after
  11. css ➞ selectors ➞ target-before
  12. css ➞ types ➞ mod ➞ mixed_type_parameters
  13. css ➞ types ➞ rem ➞ mixed_type_parameters
  14. css ➞ types ➞ round ➞ mixed_type_parameters

HTML

  1. html ➞ elements ➞ iframe ➞ cross-origin-top-navigation-by-user-activation

WEBASSEMBLY

  1. webassembly ➞ api ➞ JSTag_static

WEBDRIVER

  1. webdriver ➞ bidi ➞ bluetooth
  2. webdriver ➞ bidi ➞ bluetooth ➞ disableSimulation
  3. webdriver ➞ bidi ➞ bluetooth ➞ handleRequestDevicePrompt
  4. webdriver ➞ bidi ➞ bluetooth ➞ simulateAdapter
  5. webdriver ➞ bidi ➞ bluetooth ➞ simulateAdvertisement
  6. webdriver ➞ bidi ➞ bluetooth ➞ simulateCharacteristic
  7. webdriver ➞ bidi ➞ bluetooth ➞ simulateCharacteristicResponse
  8. webdriver ➞ bidi ➞ bluetooth ➞ simulateDescriptor
  9. webdriver ➞ bidi ➞ bluetooth ➞ simulateDescriptorResponse
  10. webdriver ➞ bidi ➞ bluetooth ➞ simulateGattConnectionResponse
  11. webdriver ➞ bidi ➞ bluetooth ➞ simulateGattDisconnection
  12. webdriver ➞ bidi ➞ bluetooth ➞ simulatePreconnectedPeripheral
  13. webdriver ➞ bidi ➞ bluetooth ➞ simulateService
  14. webdriver ➞ bidi ➞ browser ➞ setDownloadBehavior
  15. webdriver ➞ bidi ➞ browser ➞ setDownloadBehavior ➞ downloadBehavior_parameter
  16. webdriver ➞ bidi ➞ browser ➞ setDownloadBehavior ➞ userContexts_parameter
  17. webdriver ➞ bidi ➞ emulation ➞ setLocaleOverride ➞ locale_parameter ➞ sets_navigator_language
  18. webdriver ➞ bidi ➞ emulation ➞ setUserAgentOverride
  19. webdriver ➞ bidi ➞ emulation ➞ setUserAgentOverride ➞ contexts_parameter
  20. webdriver ➞ bidi ➞ emulation ➞ setUserAgentOverride ➞ userAgent_parameter
  21. webdriver ➞ bidi ➞ emulation ➞ setUserAgentOverride ➞ userContexts_parameter

WEBEXTENSIONS

  1. webextensions ➞ api ➞ sidePanel ➞ GetPanelOptions
  2. webextensions ➞ api ➞ sidePanel ➞ OpenOptions
  3. webextensions ➞ api ➞ sidePanel ➞ PanelBehavior
  4. webextensions ➞ api ➞ sidePanel ➞ PanelLayout
  5. webextensions ➞ api ➞ sidePanel ➞ PanelOpenedInfo
  6. webextensions ➞ api ➞ sidePanel ➞ PanelOptions
  7. webextensions ➞ api ➞ sidePanel ➞ Side
  8. webextensions ➞ api ➞ sidePanel ➞ SidePanel
  9. webextensions ➞ api ➞ sidePanel
  10. webextensions ➞ api ➞ sidePanel ➞ getLayout
  11. webextensions ➞ api ➞ sidePanel ➞ getOptions
  12. webextensions ➞ api ➞ sidePanel ➞ getPanelBehavior
  13. webextensions ➞ api ➞ sidePanel ➞ onOpened
  14. webextensions ➞ api ➞ sidePanel ➞ open
  15. webextensions ➞ api ➞ sidePanel ➞ setOptions
  16. webextensions ➞ api ➞ sidePanel ➞ setPanelBehavior
  17. webextensions ➞ manifest ➞ permissions ➞ sidePanel
  18. webextensions ➞ manifest ➞ side_panel
  19. webextensions ➞ manifest ➞ side_panel ➞ default_path

Removed entries (1)

The entries in this section were found in BCD on Friday, 26 September 2025, 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 ➞ scrollIntoView ➞ options_container_parameter