Media element pseudo-classesLimited availability
The :playing, :paused, :seeking, :buffering, :stalled, :muted, and :volume-locked CSS pseudo-classes match <audio> and <video> elements based on their state.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
✕Not supportedup to 155
Current: 155Edge
✕Not supportedup to 154
Current: 154Firefox
1–149Not supported
150+Supportedsince Apr 21, 2026
Current: 157Safari
1–15.3Not supported
15.4+Supportedsince Mar 14, 2022
Current: 27MobileChrome Android
✕Not supportedup to 155
Current: 155Firefox Android
4–149Not supported
150+Supportedsince Apr 21, 2026
Current: 157Safari iOS
1–15.3Not supported
15.4+Supportedsince Mar 14, 2022
Current: 27How to use
Not supported in Chrome, Edge, Chrome Android. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: :buffering.
Feature detection
CSS · check before using
@supports selector(:buffering) {
/* styles that use :buffering */
}
/* or in JavaScript */
if (CSS.supports("selector(:buffering)")) {
// use it
}Sub-features
Support for each part of the feature (7). The overall table above shows when the whole feature works.