Web platform features explorer - Time-relative pseudo-selectors

Web platform features explorer

The :past and :future CSS pseudo-classes match prior or upcoming text track cues during media playback.

Status

Limited availability

MDN documentation

Specifications

WebVTT: The Web Video Text Tracks Format (#the-past-and-future-pseudo-classes), from Timed Text Working Group (W3C).

Browser support

Chrome 23 Released on 2012-11-06
Chrome Android 25 Released on 2013-02-27
Edge 79 Released on 2020-01-15
Firefox ❌
Firefox for Android ❌
Safari 7 Released on 2013-10-22
Safari on iOS 7 Released on 2013-09-18

Baseline availability blocked since January 2020 by Firefox (66 months)

Usage (according to Chrome Platform Status)

~0.050% of page loads. More data at chromestatus.

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