coderef

Container timing performance entriesLimited availability

A container performance entry measures time to render child elements, for container elements that have the containertiming attribute.

Not yet supported in all major browsers — check the table and provide a fallback.

How to use ↓Compare browsers

Browser support

DesktopChrome
✕Not supportedup to 155
Current: 155
Edge
✕Not supportedup to 154
Current: 154
Firefox
✕Not supportedup to 157
Current: 157
Safari
✕Not supportedup to 27
Current: 27
MobileChrome Android
✕Not supportedup to 155
Current: 155
Firefox Android
✕Not supportedup to 157
Current: 157
Safari iOS
✕Not supportedup to 27
Current: 27

How to use

Not supported in Chrome, Edge, Firefox, Safari, Chrome Android, 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 — see the links below.

Feature detection

JS · check before using
if ("HTMLElement" in globalThis && "containerTiming" in HTMLElement.prototype) {
  // HTMLElement.containerTiming is available
}

Specification

Sub-features

Support for each part of the feature (11). The overall table above shows when the whole feature works.

Sub-featureChromeEdgeFirefoxSafariChrome AndroidFirefox AndroidSafari iOS
HTMLElement.containerTiming✕✕✕✕✕✕✕
HTMLElement.containerTimingIgnore✕✕✕✕✕✕✕
PerformanceContainerTiming✕✕✕✕✕✕✕
PerformanceContainerTiming.firstRenderTime✕✕✕✕✕✕✕
PerformanceContainerTiming.identifier✕✕✕✕✕✕✕
PerformanceContainerTiming.intersectionRect✕✕✕✕✕✕✕
PerformanceContainerTiming.lastPaintedElement✕✕✕✕✕✕✕
PerformanceContainerTiming.rootElement✕✕✕✕✕✕✕
PerformanceContainerTiming.size✕✕✕✕✕✕✕
containertiming✕✕✕✕✕✕✕
containertimingignore✕✕✕✕✕✕✕