[webvtt] Pull Request: Add support for ::cue-container

jernoble has just submitted a new pull request for https://github.com/w3c/webvtt:

== Add support for ::cue-container ==
Fixes #516

In order to align the capabilities of WebVTT with CEA standards like 708, add the concept of a "WebVTT block background box", which is defined as a block-level wrapper around the WebVTT cue's contents.

To allow authors to specify styles that apply to this block background object, add a new selector `::cue-container` that matches it. UAs which provide FCC required styling information for "window background & opacity" can do so via this new selector in UA-provided style sheets.

See https://github.com/w3c/webvtt/pull/528


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Received on Wednesday, 12 February 2025 01:19:02 UTC