PerformanceLongTaskTiming: attribution property

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The attribution read-only property of the PerformanceLongTaskTiming interface returns an array of TaskAttributionTiming objects.

Value

Examples

Logging attributions for long tasks

js
const observer = new PerformanceObserver((list) => {
  list.getEntries().forEach((entry) => {
    entry.attribution.forEach((attributionEntry) => {
      console.log(attributionEntry);
    });
  });
});

observer.observe({ type: "longtask", buffered: true });

Specifications

Specification
Long Tasks API
# dom-performancelongtasktiming-attribution

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
attribution
Experimental

Legend

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Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.

See also