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web-platform-tests / interop

web-platform-tests Interop project
https://wpt.fyi/interop
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WebVTT Rendering #874

Closed danae404 closed 1 month ago

danae404 commented 1 month ago

Description

Inconsistent rendering of WebVTT across web browsers makes the format unattractive to web developers, who instead choose to use parse and render subtitles in javascript, which is incompatible with macOS and iOS system accessibility settings and fullscreen modes. A WebVTT Rendering focus area is important for increasing its usage on the web.

Specification

https://w3c.github.io/webvtt/

Additional Signals

This proposal was discussed at the Timed Text WG at TPAC this year, and the group unanimously supported its inclusion in Interop 2025.

There is an existing test suite for WebVTT Rendering. Low scores demonstrate a severe lack of interoperability between browsers, with no browser passing more than 30% of the tests.

danae404 commented 1 month ago

It looks like a related proposal was filed as issue #860

jgraham commented 1 month ago

I'm going to close this as a duplicate of the earlier issue because they appear to have identical scopes. Please add any extra context you want in that issue.