The takeRecords()
method of the PerformanceObserver
interface returns the current list of PerformanceEntry
objects stored in the performance observer, emptying it out.
PerformanceObserver: takeRecords() method
Syntax
js
takeRecords()
Parameters
None.
Return value
A list of PerformanceEntry
objects.
Examples
Taking records
The following example stores the current list of performance entries into records
and empties the performance observer.
js
const observer = new PerformanceObserver((list, obj) => { list.getEntries().forEach((entry) => { // Process "mark" and "measure" events }); }); observer.observe({ entryTypes: ["mark", "measure"] }); const records = observer.takeRecords(); console.log(records[0].name); console.log(records[0].startTime); console.log(records[0].duration);
Specifications
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Opera | Safari | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | WebView Android | ||
takeRecords |
65 | 79 | 60 | 52 | 15 | 65 | 60 | 47 | 15 | 9.0 | 65 |
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https://developer.mozilla.org/en-US/docs/Web/API/PerformanceObserver/takeRecords