Summary of BCD changes from through π
Browser Support Changes: +33, -0
Support increases (33)
API
-
api β TrustedHTMLParserOptions
Added to Chrome β 1 of 3 engines -
api β WebTransport β reliability
Added to Chrome β 3 of 3 engines -
api β WebTransport β supportsReliableOnly_static
Added to Chrome β 3 of 3 engines -
api β CanvasPaintEvent β CanvasPaintEvent
Added to Chrome β 1 of 3 engines -
api β CanvasPaintEvent
Added to Chrome β 1 of 3 engines -
api β CanvasPaintEvent β changedElements
Added to Chrome β 1 of 3 engines -
api β CanvasRenderingContext2D β drawElementImage
Added to Chrome β 1 of 3 engines -
api β ElementGeometryUpdateEvent β ElementGeometryUpdateEvent
Added to Chrome β 1 of 3 engines -
api β ElementGeometryUpdateEvent
Added to Chrome β 1 of 3 engines -
api β ElementGeometryUpdateEvent β elements
Added to Chrome β 1 of 3 engines -
api β ElementImage
Added to Chrome β 1 of 3 engines -
api β ElementImage β close
Added to Chrome β 1 of 3 engines -
api β ElementImage β worker_support
Added to Chrome β 1 of 3 engines -
api β GPUQueue β drawElementImageToTexture
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β captureElementImage
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β clearElementGeometry
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β content
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β elementgeometryupdate_event
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β getElementImageDefaultSize
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β getElementTransform
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β paint_event
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β requestPaint
Added to Chrome β 1 of 3 engines -
api β HTMLCanvasElement β updateElementGeometry
Added to Chrome β 1 of 3 engines -
api β OffscreenCanvas β clearElementGeometry
Added to Chrome β 1 of 3 engines -
api β OffscreenCanvas β getElementImageDefaultSize
Added to Chrome β 1 of 3 engines -
api β OffscreenCanvas β updateElementGeometry
Added to Chrome β 1 of 3 engines -
api β OffscreenCanvasRenderingContext2D β drawElementImage
Added to Chrome β 1 of 3 engines -
api β TrustedTypePolicy β createParserOptions
Added to Chrome β 1 of 3 engines -
api β WebGL2RenderingContext β texElementSubImage2D
Added to Chrome β 1 of 3 engines -
api β WebGLRenderingContext β texElementSubImage2D
Added to Chrome β 1 of 3 engines
HTML
-
html β elements β canvas β content
Added to Chrome β 1 of 3 engines -
html β global_attributes β drawable
Added to Chrome β 1 of 3 engines
WEBEXTENSIONS
-
webextensions β api β runtime β PlatformArch β arm64
Added to Firefox β 2 of 3 engines
BCD Metadata Changes: 506
Show all 506 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 (243)
The entries in this section saw support information change since the report on Monday, 19 October 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
-
api β Window β setResizable
Backfilled for Chrome β 2 of 3 engines -
api β AudioContext β AudioContext β options_renderSizeHint_parameter
Backfilled for Chrome β 1 of 3 engines -
api β GPUSupportedFeatures β feature_subgroup-size-control
Backfilled for Chrome β 1 of 3 engines -
api β HTMLElement β focusGroup
Backfilled for Chrome β 1 of 3 engines -
api β HTMLElement β focusGroupStart
Backfilled for Chrome β 1 of 3 engines -
api β MathMLAnchorElement β download
Backfilled for Firefox β 1 of 3 engines -
api β MathMLAnchorElement β ping
Backfilled for Firefox β 1 of 3 engines -
api β MathMLAnchorElement β referrerPolicy
Backfilled for Firefox β 1 of 3 engines -
api β MathMLAnchorElement β rel
Backfilled for Firefox β 1 of 3 engines -
api β MathMLAnchorElement β relList
Backfilled for Firefox β 1 of 3 engines -
api β Notification β Notification β options_parameter
Backfilled for Firefox β 3 of 3 engines -
api β Notification β Notification β options_parameter β navigate
Backfilled for Firefox β 2 of 3 engines -
api β OfflineAudioContext β OfflineAudioContext β options_renderSizeHint_parameter
Backfilled for Chrome β 1 of 3 engines -
api β RTCPeerConnection β addTransceiver β init_sendEncodings_parameter β scalabilityMode
Backfilled for Chrome β 2 of 3 engines -
api β RTCRtpSender β setParameters β parameters_encodings_parameter β scalabilityMode
Backfilled for Chrome β 2 of 3 engines -
api β SVGElement β focusGroup
Backfilled for Chrome β 1 of 3 engines -
api β SVGElement β focusGroupStart
Backfilled for Chrome β 1 of 3 engines -
api β ServiceWorkerRegistration β showNotification β options_navigate_parameter
Backfilled for Firefox β 2 of 3 engines -
api β Window β maximize
Backfilled for Chrome β 1 of 3 engines -
api β Window β minimize
Backfilled for Chrome β 1 of 3 engines -
api β Window β restore
Backfilled for Chrome β 1 of 3 engines
HTML
-
html β elements β template β shadowrootserializable
Backfilled for Firefox β 3 of 3 engines -
html β global_attributes β focusgroup
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β behavior_listbox
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β behavior_menu
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β behavior_menubar
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β behavior_radiogroup
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β behavior_tablist
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β behavior_toolbar
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β block
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β inline
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β nomemory
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β none
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β nowrap
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroup β wrap
Backfilled for Chrome β 1 of 3 engines -
html β global_attributes β focusgroupstart
Backfilled for Chrome β 1 of 3 engines
HTTP
-
http β status β 425
Backfilled for Chrome β 2 of 3 engines -
http β headers β Cross-Origin-Embedder-Policy-Report-Only
Backfilled for Chrome β 2 of 3 engines -
http β headers β Cross-Origin-Embedder-Policy-Report-Only β report-to_parameter
Backfilled for Chrome β 2 of 3 engines -
http β headers β Cross-Origin-Opener-Policy-Report-Only
Backfilled for Chrome β 2 of 3 engines -
http β headers β Cross-Origin-Opener-Policy-Report-Only β report-to_parameter
Backfilled for Chrome β 2 of 3 engines -
http β headers β Document-Isolation-Policy
Backfilled for Chrome β 1 of 3 engines
JAVASCRIPT
-
javascript β builtins β Intl β PluralRules β PluralRules β options_parameter β options_trailingZeroDisplay_parameter
Backfilled for Chrome β 3 of 3 engines
WEBDRIVER
-
webdriver β bidi β browsingContext β domContentLoaded_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β downloadEnd_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β downloadWillBegin_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β fragmentNavigated_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β historyUpdated_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β load_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β navigationCommitted_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β navigationFailed_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β navigationStarted_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptClosed_event β type_parameter β alert
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptClosed_event β type_parameter β beforeunload
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptClosed_event β type_parameter β confirm
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptClosed_event β type_parameter β prompt
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptClosed_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptOpened_event β type_parameter β alert
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptOpened_event β type_parameter β beforeunload
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptOpened_event β type_parameter β confirm
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptOpened_event β type_parameter β prompt
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β userPromptOpened_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setLocaleOverride β cross_origin_iframes
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setLocaleOverride β dedicated_and_shared_workers
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setLocaleOverride β locale_parameter β sets_accept-language_header
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setLocaleOverride β updates_existing_sandboxes
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setMediaFeaturesOverride
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setMediaFeaturesOverride β contexts_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setMediaFeaturesOverride β features_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setMediaFeaturesOverride β features_parameter β prefers-color-scheme
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setMediaFeaturesOverride β userContexts_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setScreenSettingsOverride
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β emulation β setTimezoneOverride β dedicated_and_shared_workers
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β input β fileDialogOpened_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β addDataCollector β dataTypes_parameter β response
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β addDataCollector β maxEncodedDataSize_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β authRequired_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β beforeRequestSent_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β disownData β dataType_parameter β request
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β disownData β dataType_parameter β response
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β fetchError_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β responseCompleted_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β network β responseStarted_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β script β message_event β source_parameter β userContext
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β script β realmCreated_event β userContext_parameter
Backfilled for Chrome β 2 of 3 engines -
webdriver β bidi β browsingContext β navigationAborted_event β context_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β browsingContext β navigationAborted_event β navigation_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β browsingContext β navigationAborted_event β timestamp_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β browsingContext β navigationAborted_event β url_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β browsingContext β navigationAborted_event β userContext_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setScreenSettingsOverride β contexts_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setScreenSettingsOverride β screenArea_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setScreenSettingsOverride β userContexts_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setScrollbarTypeOverride
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setScrollbarTypeOverride β contexts_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setScrollbarTypeOverride β scrollbarType_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setScrollbarTypeOverride β userContexts_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setTouchOverride
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setTouchOverride β contexts_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setTouchOverride β maxTouchPoints_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setTouchOverride β userContexts_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setViewportMetaOverride
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setViewportMetaOverride β contexts_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setViewportMetaOverride β userContexts_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β emulation β setViewportMetaOverride β viewportMeta_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β network β addDataCollector β dataTypes_parameter β request
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β permissions
Backfilled for Firefox β 2 of 3 engines -
webdriver β bidi β permissions β setPermission
Backfilled for Firefox β 2 of 3 engines -
webdriver β bidi β permissions β setPermission β descriptor_parameter
Backfilled for Firefox β 2 of 3 engines -
webdriver β bidi β permissions β setPermission β embeddedOrigin_parameter
Backfilled for Chrome β 1 of 3 engines -
webdriver β bidi β permissions β setPermission β origin_parameter
Backfilled for Firefox β 2 of 3 engines -
webdriver β bidi β permissions β setPermission β state_parameter
Backfilled for Firefox β 2 of 3 engines -
webdriver β bidi β permissions β setPermission β userContext_parameter
Backfilled for Firefox β 2 of 3 engines
CSS
-
css β at-rules β media β display-state
Backfilled for Chrome β 1 of 3 engines -
css β at-rules β media β resizable
Backfilled for Chrome β 1 of 3 engines -
css β properties β appearance β base-select β list_box
Backfilled for Chrome β 1 of 3 engines -
css β properties β column-rule-color β multiple_colors
Backfilled for Chrome β 1 of 3 engines -
css β properties β column-rule-color β repeat
Backfilled for Chrome β 1 of 3 engines -
css β properties β justify-content β center
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β context_flex
Backfilled for Firefox β 2 of 3 engines -
css β properties β justify-content β context_grid
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β end
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β flex-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β flex-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β safe
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β space-around
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β space-between
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β space-evenly
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β start
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β stretch
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-content β unsafe
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β baseline
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β context_block
Backfilled for Chrome β 1 of 3 engines -
css β properties β justify-items β context_flex
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β context_grid
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β end
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β flex-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β flex-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β normal
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β self-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β self-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β start
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-items β stretch
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β baseline
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β center
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β context_block
Backfilled for Chrome β 1 of 3 engines -
css β properties β justify-self β context_grid
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β context_position_absolute
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β end
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β flex-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β flex-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β self-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β self-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β justify-self β start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β baseline
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β center
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β context_flex
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β context_grid
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β end
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β flex-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β flex-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β normal
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β space-around
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β space-between
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β space-evenly
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-content β stretch
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β baseline
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β center
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β context_flex
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β context_grid
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β end
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β flex-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β flex-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β normal
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β self-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β self-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-items β stretch
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β auto
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β baseline
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β center
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β context_flex
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β context_grid
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β context_position_absolute
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β end
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β flex-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β flex-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β normal
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β self-end
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β self-start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β start
Backfilled for Firefox β 3 of 3 engines -
css β properties β place-self β stretch
Backfilled for Firefox β 3 of 3 engines -
css β selectors β interest-button
Backfilled for Chrome β 1 of 3 engines -
css β types β random β auto
Backfilled for Firefox β 3 of 3 engines -
css β types β random β element-scoped
Backfilled for Firefox β 3 of 3 engines -
css β types β random β fixed
Backfilled for Firefox β 2 of 3 engines -
css β types β random β property-index-scoped
Backfilled for Firefox β 3 of 3 engines -
css β types β random β property-scoped
Backfilled for Firefox β 3 of 3 engines
SVG
-
svg β elements β circle β pathLength
Backfilled for Firefox β 3 of 3 engines -
svg β elements β ellipse β pathLength
Backfilled for Firefox β 3 of 3 engines -
svg β elements β line β pathLength
Backfilled for Firefox β 3 of 3 engines -
svg β elements β path β pathLength
Backfilled for Firefox β 3 of 3 engines -
svg β elements β polygon β pathLength
Backfilled for Firefox β 3 of 3 engines -
svg β elements β polyline β pathLength
Backfilled for Firefox β 3 of 3 engines -
svg β elements β rect β pathLength
Backfilled for Firefox β 3 of 3 engines -
svg β elements β view β svgView
Backfilled for Firefox β 3 of 3 engines -
svg β elements β view β svgView β preserveAspectRatio_parameter
Backfilled for Firefox β 3 of 3 engines -
svg β elements β view β svgView β transform_parameter
Backfilled for Firefox β 3 of 3 engines -
svg β elements β view β svgView β viewBox_parameter
Backfilled for Firefox β 3 of 3 engines -
svg β global_attributes β focusgroup
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β behavior_listbox
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β behavior_menu
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β behavior_menubar
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β behavior_radiogroup
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β behavior_tablist
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β behavior_toolbar
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β block
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β inline
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β nomemory
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β none
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β nowrap
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroup β wrap
Backfilled for Chrome β 1 of 3 engines -
svg β global_attributes β focusgroupstart
Backfilled for Chrome β 1 of 3 engines
WEBASSEMBLY
-
webassembly β instructions β ref_as_non_null
Backfilled for Firefox β 3 of 3 engines -
webassembly β instructions β ref_cast
Backfilled for Firefox β 3 of 3 engines -
webassembly β instructions β ref_eq
Backfilled for Firefox β 3 of 3 engines -
webassembly β instructions β ref_func
Backfilled for Firefox β 3 of 3 engines -
webassembly β instructions β ref_is_null
Backfilled for Firefox β 3 of 3 engines -
webassembly β instructions β ref_null
Backfilled for Firefox β 3 of 3 engines -
webassembly β instructions β ref_test
Backfilled for Firefox β 3 of 3 engines
WEBEXTENSIONS
-
webextensions β api β runtime β PlatformArch β aarch64
Backfilled for Firefox β 1 of 3 engines -
webextensions β api β runtime β PlatformArch β arm
Backfilled for Firefox β 3 of 3 engines -
webextensions β api β runtime β PlatformArch β mips
Backfilled for Chrome β 1 of 3 engines -
webextensions β api β runtime β PlatformArch β mips64
Backfilled for Chrome β 1 of 3 engines -
webextensions β api β runtime β PlatformArch β noarch
Backfilled for Firefox β 1 of 3 engines -
webextensions β api β runtime β PlatformArch β ppc64
Backfilled for Firefox β 1 of 3 engines -
webextensions β api β runtime β PlatformArch β riscv64
Backfilled for Firefox β 2 of 3 engines -
webextensions β api β runtime β PlatformArch β s390x
Backfilled for Firefox β 1 of 3 engines -
webextensions β api β runtime β PlatformArch β sparc64
Backfilled for Firefox β 1 of 3 engines -
webextensions β api β runtime β PlatformArch β unknown
Backfilled for Safari β 1 of 3 engines -
webextensions β api β runtime β PlatformArch β x86-32
Backfilled for Firefox β 2 of 3 engines -
webextensions β api β runtime β PlatformArch β x86-64
Backfilled for Firefox β 3 of 3 engines
New entries (227)
The entries in this section were not found in BCD on Monday, 19 October 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 (βRemoved BCD entriesβ) because of a Working Group deciding on a rename.
API
- api β AudioContext β AudioContext β options_renderSizeHint_parameter
- api β CanvasPaintEvent β CanvasPaintEvent
- api β CanvasPaintEvent
- api β CanvasPaintEvent β changedElements
- api β CanvasRenderingContext2D β drawElementImage
- api β ElementGeometryUpdateEvent β ElementGeometryUpdateEvent
- api β ElementGeometryUpdateEvent
- api β ElementGeometryUpdateEvent β elements
- api β ElementImage
- api β ElementImage β close
- api β ElementImage β worker_support
- api β GPUQueue β drawElementImageToTexture
- api β GPUSupportedFeatures β feature_subgroup-size-control
- api β HTMLCanvasElement β captureElementImage
- api β HTMLCanvasElement β clearElementGeometry
- api β HTMLCanvasElement β content
- api β HTMLCanvasElement β elementgeometryupdate_event
- api β HTMLCanvasElement β getElementImageDefaultSize
- api β HTMLCanvasElement β getElementTransform
- api β HTMLCanvasElement β paint_event
- api β HTMLCanvasElement β requestPaint
- api β HTMLCanvasElement β updateElementGeometry
- api β HTMLElement β focusGroup
- api β HTMLElement β focusGroupStart
- api β MathMLAnchorElement β download
- api β MathMLAnchorElement β ping
- api β MathMLAnchorElement β referrerPolicy
- api β MathMLAnchorElement β rel
- api β MathMLAnchorElement β relList
- api β Notification β Notification β options_parameter
- api β Notification β Notification β options_parameter β navigate
- api β OfflineAudioContext β OfflineAudioContext β options_renderSizeHint_parameter
- api β OffscreenCanvas β clearElementGeometry
- api β OffscreenCanvas β getElementImageDefaultSize
- api β OffscreenCanvas β updateElementGeometry
- api β OffscreenCanvasRenderingContext2D β drawElementImage
- api β RTCPeerConnection β addTransceiver β init_sendEncodings_parameter β scalabilityMode
- api β RTCRtpSender β setParameters β parameters_encodings_parameter β scalabilityMode
- api β SVGElement β focusGroup
- api β SVGElement β focusGroupStart
- api β ServiceWorkerRegistration β showNotification β options_navigate_parameter
- api β TrustedTypePolicy β createParserOptions
- api β WebGL2RenderingContext β texElementSubImage2D
- api β WebGLRenderingContext β texElementSubImage2D
- api β Window β maximize
- api β Window β minimize
- api β Window β restore
CSS
- css β at-rules β media β display-state
- css β at-rules β media β resizable
- css β properties β appearance β base-select β list_box
- css β properties β column-rule-color β multiple_colors
- css β properties β column-rule-color β repeat
- css β properties β justify-content β center
- css β properties β justify-content β context_flex
- css β properties β justify-content β context_grid
- css β properties β justify-content β end
- css β properties β justify-content β flex-end
- css β properties β justify-content β flex-start
- css β properties β justify-content β safe
- css β properties β justify-content β space-around
- css β properties β justify-content β space-between
- css β properties β justify-content β space-evenly
- css β properties β justify-content β start
- css β properties β justify-content β stretch
- css β properties β justify-content β unsafe
- css β properties β justify-items β baseline
- css β properties β justify-items β context_block
- css β properties β justify-items β context_flex
- css β properties β justify-items β context_grid
- css β properties β justify-items β end
- css β properties β justify-items β flex-end
- css β properties β justify-items β flex-start
- css β properties β justify-items β normal
- css β properties β justify-items β self-end
- css β properties β justify-items β self-start
- css β properties β justify-items β start
- css β properties β justify-items β stretch
- css β properties β justify-self β baseline
- css β properties β justify-self β center
- css β properties β justify-self β context_block
- css β properties β justify-self β context_grid
- css β properties β justify-self β context_position_absolute
- css β properties β justify-self β end
- css β properties β justify-self β flex-end
- css β properties β justify-self β flex-start
- css β properties β justify-self β self-end
- css β properties β justify-self β self-start
- css β properties β justify-self β start
- css β properties β place-content β baseline
- css β properties β place-content β center
- css β properties β place-content β context_flex
- css β properties β place-content β context_grid
- css β properties β place-content β end
- css β properties β place-content β flex-end
- css β properties β place-content β flex-start
- css β properties β place-content β normal
- css β properties β place-content β space-around
- css β properties β place-content β space-between
- css β properties β place-content β space-evenly
- css β properties β place-content β start
- css β properties β place-content β stretch
- css β properties β place-items β baseline
- css β properties β place-items β center
- css β properties β place-items β context_flex
- css β properties β place-items β context_grid
- css β properties β place-items β end
- css β properties β place-items β flex-end
- css β properties β place-items β flex-start
- css β properties β place-items β normal
- css β properties β place-items β self-end
- css β properties β place-items β self-start
- css β properties β place-items β start
- css β properties β place-items β stretch
- css β properties β place-self β auto
- css β properties β place-self β baseline
- css β properties β place-self β center
- css β properties β place-self β context_flex
- css β properties β place-self β context_grid
- css β properties β place-self β context_position_absolute
- css β properties β place-self β end
- css β properties β place-self β flex-end
- css β properties β place-self β flex-start
- css β properties β place-self β normal
- css β properties β place-self β self-end
- css β properties β place-self β self-start
- css β properties β place-self β start
- css β properties β place-self β stretch
- css β selectors β interest-button
- css β types β random β auto
- css β types β random β element-scoped
- css β types β random β fixed
- css β types β random β property-index-scoped
- css β types β random β property-scoped
HTML
- html β elements β canvas β content
- html β global_attributes β drawable
- html β global_attributes β focusgroup
- html β global_attributes β focusgroup β behavior_listbox
- html β global_attributes β focusgroup β behavior_menu
- html β global_attributes β focusgroup β behavior_menubar
- html β global_attributes β focusgroup β behavior_radiogroup
- html β global_attributes β focusgroup β behavior_tablist
- html β global_attributes β focusgroup β behavior_toolbar
- html β global_attributes β focusgroup β block
- html β global_attributes β focusgroup β inline
- html β global_attributes β focusgroup β nomemory
- html β global_attributes β focusgroup β none
- html β global_attributes β focusgroup β nowrap
- html β global_attributes β focusgroup β wrap
- html β global_attributes β focusgroupstart
HTTP
- http β headers β Cross-Origin-Embedder-Policy-Report-Only
- http β headers β Cross-Origin-Embedder-Policy-Report-Only β report-to_parameter
- http β headers β Cross-Origin-Opener-Policy-Report-Only
- http β headers β Cross-Origin-Opener-Policy-Report-Only β report-to_parameter
- http β headers β Document-Isolation-Policy
SVG
- svg β elements β circle β pathLength
- svg β elements β ellipse β pathLength
- svg β elements β line β pathLength
- svg β elements β path β pathLength
- svg β elements β polygon β pathLength
- svg β elements β polyline β pathLength
- svg β elements β rect β pathLength
- svg β elements β view β svgView
- svg β elements β view β svgView β preserveAspectRatio_parameter
- svg β elements β view β svgView β transform_parameter
- svg β elements β view β svgView β viewBox_parameter
- svg β global_attributes β focusgroup
- svg β global_attributes β focusgroup β behavior_listbox
- svg β global_attributes β focusgroup β behavior_menu
- svg β global_attributes β focusgroup β behavior_menubar
- svg β global_attributes β focusgroup β behavior_radiogroup
- svg β global_attributes β focusgroup β behavior_tablist
- svg β global_attributes β focusgroup β behavior_toolbar
- svg β global_attributes β focusgroup β block
- svg β global_attributes β focusgroup β inline
- svg β global_attributes β focusgroup β nomemory
- svg β global_attributes β focusgroup β none
- svg β global_attributes β focusgroup β nowrap
- svg β global_attributes β focusgroup β wrap
- svg β global_attributes β focusgroupstart
WEBASSEMBLY
- webassembly β instructions β ref_as_non_null
- webassembly β instructions β ref_cast
- webassembly β instructions β ref_eq
- webassembly β instructions β ref_func
- webassembly β instructions β ref_is_null
- webassembly β instructions β ref_null
- webassembly β instructions β ref_test
WEBDRIVER
- webdriver β bidi β browsingContext β navigationAborted_event β context_parameter
- webdriver β bidi β browsingContext β navigationAborted_event β navigation_parameter
- webdriver β bidi β browsingContext β navigationAborted_event β timestamp_parameter
- webdriver β bidi β browsingContext β navigationAborted_event β url_parameter
- webdriver β bidi β browsingContext β navigationAborted_event β userContext_parameter
- webdriver β bidi β emulation β setScreenSettingsOverride β contexts_parameter
- webdriver β bidi β emulation β setScreenSettingsOverride β screenArea_parameter
- webdriver β bidi β emulation β setScreenSettingsOverride β userContexts_parameter
- webdriver β bidi β emulation β setScrollbarTypeOverride
- webdriver β bidi β emulation β setScrollbarTypeOverride β contexts_parameter
- webdriver β bidi β emulation β setScrollbarTypeOverride β scrollbarType_parameter
- webdriver β bidi β emulation β setScrollbarTypeOverride β userContexts_parameter
- webdriver β bidi β emulation β setTouchOverride
- webdriver β bidi β emulation β setTouchOverride β contexts_parameter
- webdriver β bidi β emulation β setTouchOverride β maxTouchPoints_parameter
- webdriver β bidi β emulation β setTouchOverride β userContexts_parameter
- webdriver β bidi β emulation β setViewportMetaOverride
- webdriver β bidi β emulation β setViewportMetaOverride β contexts_parameter
- webdriver β bidi β emulation β setViewportMetaOverride β userContexts_parameter
- webdriver β bidi β emulation β setViewportMetaOverride β viewportMeta_parameter
- webdriver β bidi β network β addDataCollector β dataTypes_parameter β request
- webdriver β bidi β permissions
- webdriver β bidi β permissions β setPermission
- webdriver β bidi β permissions β setPermission β descriptor_parameter
- webdriver β bidi β permissions β setPermission β embeddedOrigin_parameter
- webdriver β bidi β permissions β setPermission β origin_parameter
- webdriver β bidi β permissions β setPermission β state_parameter
- webdriver β bidi β permissions β setPermission β userContext_parameter
WEBEXTENSIONS
- webextensions β api β runtime β PlatformArch β aarch64
- webextensions β api β runtime β PlatformArch β arm
- webextensions β api β runtime β PlatformArch β arm64
- webextensions β api β runtime β PlatformArch β mips
- webextensions β api β runtime β PlatformArch β mips64
- webextensions β api β runtime β PlatformArch β noarch
- webextensions β api β runtime β PlatformArch β ppc64
- webextensions β api β runtime β PlatformArch β riscv64
- webextensions β api β runtime β PlatformArch β s390x
- webextensions β api β runtime β PlatformArch β sparc64
- webextensions β api β runtime β PlatformArch β unknown
- webextensions β api β runtime β PlatformArch β x86-32
- webextensions β api β runtime β PlatformArch β x86-64
Removed entries (36)
The entries in this section were found in BCD on Monday, 19 October 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
- api β TrustedHTMLParserOptions β runScripts
- api β TrustedHTMLParserOptions β sanitizer
CSS
- css β properties β appearance β base-select β listbox
- css β properties β justify-content β flex_context
- css β properties β justify-content β flex_context β left_right
- css β properties β justify-content β flex_context β safe_unsafe
- css β properties β justify-content β flex_context β space-evenly
- css β properties β justify-content β flex_context β start_end
- css β properties β justify-content β flex_context β stretch
- css β properties β justify-content β grid_context
- css β properties β justify-items β block_context
- css β properties β justify-items β flex_context
- css β properties β justify-items β grid_context
- css β properties β justify-self β block_context
- css β properties β justify-self β grid_context
- css β properties β justify-self β position_absolute_context
- css β properties β place-content β flex_context
- css β properties β place-content β grid_context
- css β properties β place-items β flex_context
- css β properties β place-items β grid_context
- css β properties β place-self β flex_context
- css β properties β place-self β grid_context
- css β properties β place-self β position_absolute_context
- css β types β random β element-shared
HTTP
- http β headers β Early-Data
WEBDRIVER
- webdriver β bidi β permission
- webdriver β bidi β permission β setPermission
- webdriver β bidi β permission β setPermission β descriptor_parameter
- webdriver β bidi β permission β setPermission β embeddedOrigin_parameter
- webdriver β bidi β permission β setPermission β origin_parameter
- webdriver β bidi β permission β setPermission β state_parameter
- webdriver β bidi β permission β setPermission β userContext_parameter
- webdriver β bidi β script β getRealms β type_parameter β worklet
- webdriver β bidi β script β realmCreated_event β type_parameter β audio-worklet
- webdriver β bidi β script β realmCreated_event β type_parameter β paint-worklet
- webdriver β bidi β script β realmCreated_event β type_parameter β worklet