Lazy-loading mediaLimited availability
The loading="lazy" attribute for <video> and <audio> elements defers loading the media resource until the element is near the viewport. This matches the lazy-loading behavior for <img> and <iframe> elements.
Not yet supported in all major browsers — check the table and provide a fallback.
Browser support
DesktopChrome
1–149Not supported
150+Supportedsince Jun 30, 2026
Current: 155Edge
12–149Not supported
150+Supportedsince Jul 2, 2026
Current: 154Firefox
✕Not supportedup to 157
Current: 157Safari
✕Not supportedup to 27
Current: 27MobileChrome Android
18–149Not supported
150+Supportedsince Jun 30, 2026
Current: 155Firefox Android
✕Not supportedup to 157
Current: 157Safari iOS
✕Not supportedup to 27
Current: 27How to use
Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.
Example
Full syntax and examples are on MDN: loading.
Feature detection
JS · check before using
if ("HTMLMediaElement" in globalThis && "loading" in HTMLMediaElement.prototype) {
// HTMLMediaElement.loading is available
}Documentation (MDN)
Specification
Usage share
Sub-features
Support for each part of the feature (3). The overall table above shows when the whole feature works.
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| HTMLMediaElement.loading | 150 | 150 | ✕ | ✕ | 150 | ✕ | ✕ |
| audio.loading | 150 | 150 | ✕ | ✕ | 150 | ✕ | ✕ |
| video.loading | 150 | 150 | ✕ | ✕ | 150 | ✕ | ✕ |