BCD Watch

BCD Changes Report

Summary of BCD changes from through 🔗

Browser Support Changes: +55, -0

Support increases (55)

API

  1. api ➞ Element ➞ currentCSSZoom
    Added to Safari  ➞  3 of 3 engines
  2. api ➞ PerformanceResourceTiming ➞ deliveryType
    Added to Safari  ➞  2 of 3 engines
  3. api ➞ PerformanceResourceTiming ➞ finalResponseHeadersStart
    Added to Safari  ➞  2 of 3 engines
  4. api ➞ PerformanceResourceTiming ➞ firstInterimResponseStart
    Added to Safari  ➞  2 of 3 engines
  5. api ➞ ReadableByteStreamController
    Added to Safari  ➞  3 of 3 engines
  6. api ➞ ReadableByteStreamController ➞ byobRequest
    Added to Safari  ➞  3 of 3 engines
  7. api ➞ ReadableByteStreamController ➞ close
    Added to Safari  ➞  3 of 3 engines
  8. api ➞ ReadableByteStreamController ➞ desiredSize
    Added to Safari  ➞  3 of 3 engines
  9. api ➞ ReadableByteStreamController ➞ enqueue
    Added to Safari  ➞  3 of 3 engines
  10. api ➞ ReadableByteStreamController ➞ error
    Added to Safari  ➞  3 of 3 engines
  11. api ➞ ReadableStream ➞ @@asyncIterator
    Added to Safari  ➞  3 of 3 engines
  12. api ➞ ReadableStreamBYOBReader ➞ ReadableStreamBYOBReader
    Added to Safari  ➞  3 of 3 engines
  13. api ➞ ReadableStreamBYOBReader
    Added to Safari  ➞  3 of 3 engines
  14. api ➞ ReadableStreamBYOBReader ➞ cancel
    Added to Safari  ➞  3 of 3 engines
  15. api ➞ ReadableStreamBYOBReader ➞ closed
    Added to Safari  ➞  3 of 3 engines
  16. api ➞ ReadableStreamBYOBReader ➞ read
    Added to Safari  ➞  3 of 3 engines
  17. api ➞ ReadableStreamBYOBReader ➞ releaseLock
    Added to Safari  ➞  3 of 3 engines
  18. api ➞ ReadableStreamBYOBRequest
    Added to Safari  ➞  3 of 3 engines
  19. api ➞ ReadableStreamBYOBRequest ➞ respond
    Added to Safari  ➞  3 of 3 engines
  20. api ➞ ReadableStreamBYOBRequest ➞ respondWithNewView
    Added to Safari  ➞  3 of 3 engines
  21. api ➞ ReadableStreamBYOBRequest ➞ view
    Added to Safari  ➞  3 of 3 engines
  22. api ➞ Response ➞ body ➞ readable_byte_stream
    Added to Safari  ➞  3 of 3 engines
  23. api ➞ WebTransport ➞ byob_readers
    Added to Safari  ➞  3 of 3 engines
  24. api ➞ WebTransport ➞ createUnidirectionalStream ➞ byob_readers
    Added to Safari  ➞  3 of 3 engines
  25. api ➞ WebTransport ➞ protocol Spec link
    Added to Safari  ➞  2 of 3 engines
  26. api ➞ WebTransportDatagramDuplexStream ➞ byob_readers
    Added to Safari  ➞  2 of 3 engines
  27. api ➞ WebTransportReceiveStream ➞ getStats
    Added to Safari  ➞  2 of 3 engines
  28. api ➞ WebTransportSendStream ➞ getStats
    Added to Safari  ➞  2 of 3 engines
  29. api ➞ Document ➞ execCommand ➞ paste (⚠️ deprecated)
    Added to Firefox  ➞  2 of 3 engines
  30. api ➞ WebTransport ➞ anticipatedConcurrentIncomingBidirectionalStreams Spec link
    Added to Safari  ➞  1 of 3 engines
  31. api ➞ WebTransport ➞ anticipatedConcurrentIncomingUnidirectionalStreams Spec link
    Added to Safari  ➞  1 of 3 engines
  32. api ➞ WebTransport ➞ createSendGroup Spec link
    Added to Safari  ➞  1 of 3 engines
  33. api ➞ WebTransport ➞ draining Spec link
    Added to Safari  ➞  1 of 3 engines
  34. api ➞ WebTransport ➞ supportsReliableOnly_static Spec link
    Added to Safari  ➞  1 of 3 engines
  35. api ➞ WebTransportDatagramDuplexStream ➞ createWritable Spec link
    Added to Safari  ➞  1 of 3 engines
  36. api ➞ WebTransportDatagramsWritable Spec link
    Added to Safari  ➞  1 of 3 engines
  37. api ➞ WebTransportDatagramsWritable ➞ sendGroup Spec link
    Added to Safari  ➞  1 of 3 engines
  38. api ➞ WebTransportDatagramsWritable ➞ sendOrder Spec link
    Added to Safari  ➞  1 of 3 engines
  39. api ➞ WebTransportSendGroup Spec link
    Added to Safari  ➞  1 of 3 engines
  40. api ➞ WebTransportSendGroup ➞ getStats Spec link
    Added to Safari  ➞  1 of 3 engines
  41. api ➞ WebTransportSendStream ➞ sendGroup Spec link
    Added to Safari  ➞  1 of 3 engines

CSS

  1. css ➞ properties ➞ font-size ➞ math
    Added to Safari  ➞  3 of 3 engines
  2. css ➞ properties ➞ math-depth
    Added to Safari  ➞  3 of 3 engines
  3. css ➞ properties ➞ math-depth ➞ auto-add Spec link
    Added to Safari  ➞  3 of 3 engines
  4. css ➞ properties ➞ display ➞ grid-lanes Spec link
    Added to Safari  ➞  1 of 3 engines
  5. css ➞ properties ➞ display ➞ inline-grid-lanes Spec link
    Added to Safari  ➞  1 of 3 engines
  6. css ➞ properties ➞ flow-tolerance Spec link
    Added to Safari  ➞  1 of 3 engines
  7. css ➞ properties ➞ flow-tolerance ➞ infinite Spec link
    Added to Safari  ➞  1 of 3 engines
  8. css ➞ properties ➞ flow-tolerance ➞ normal Spec link
    Added to Safari  ➞  1 of 3 engines
  9. css ➞ types ➞ random ➞ dashed-ident Spec link
    Added to Safari  ➞  1 of 3 engines
  10. css ➞ types ➞ random ➞ element-shared Spec link
    Added to Safari  ➞  1 of 3 engines
  11. css ➞ types ➞ random ➞ step Spec link
    Added to Safari  ➞  1 of 3 engines

JAVASCRIPT

  1. javascript ➞ builtins ➞ Iterator ➞ concat
    Added to Safari  ➞  3 of 3 engines
  2. javascript ➞ builtins ➞ RegExp ➞ compile ➞ rexexp_legacy_features (⚠️ deprecated)
    Added to Firefox  ➞  2 of 3 engines

WEBDRIVER

  1. webdriver ➞ bidi ➞ browser ➞ setDownloadBehavior Spec link
    Added to Firefox  ➞  2 of 3 engines

BCD Metadata Changes: 24

Show all 24 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.

New entries (22)

The entries in this section were not found in BCD on Friday, 13 February 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 ➞ execCommand ➞ paste
  2. api ➞ WebTransport ➞ anticipatedConcurrentIncomingBidirectionalStreams
  3. api ➞ WebTransport ➞ anticipatedConcurrentIncomingUnidirectionalStreams
  4. api ➞ WebTransport ➞ createSendGroup
  5. api ➞ WebTransport ➞ draining
  6. api ➞ WebTransport ➞ supportsReliableOnly_static
  7. api ➞ WebTransportDatagramDuplexStream ➞ createWritable
  8. api ➞ WebTransportDatagramsWritable
  9. api ➞ WebTransportDatagramsWritable ➞ sendGroup
  10. api ➞ WebTransportDatagramsWritable ➞ sendOrder
  11. api ➞ WebTransportSendGroup
  12. api ➞ WebTransportSendGroup ➞ getStats
  13. api ➞ WebTransportSendStream ➞ sendGroup

CSS

  1. css ➞ properties ➞ display ➞ grid-lanes
  2. css ➞ properties ➞ display ➞ inline-grid-lanes
  3. css ➞ properties ➞ flow-tolerance
  4. css ➞ properties ➞ flow-tolerance ➞ infinite
  5. css ➞ properties ➞ flow-tolerance ➞ normal
  6. css ➞ types ➞ random ➞ dashed-ident
  7. css ➞ types ➞ random ➞ element-shared
  8. css ➞ types ➞ random ➞ step

JAVASCRIPT

  1. javascript ➞ builtins ➞ RegExp ➞ compile ➞ rexexp_legacy_features

Removed entries (2)

The entries in this section were found in BCD on Friday, 13 February 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.

HTML

  1. html ➞ global_attributes ➞ nonce ➞ nonce_hiding

HTTP

  1. http ➞ headers ➞ X-Frame-Options ➞ ALLOW-FROM