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 anexperimental technology
Check theBrowser compatibility table carefully before using this in production.

Theattribution read-only property of thePerformanceLongTaskTiming interface returns an array ofTaskAttributionTiming objects.

Value

AnArray ofTaskAttributionTiming objects.

Examples

Logging attributions for long tasks

const observer = new PerformanceObserver((list) => {  list.getEntries().forEach((entry) => {    entry.attribution.forEach((attributionEntry) => {      console.log(attributionEntry);    });  });});observer.observe({ type: "longtask", buffered: true });