The takeRecords() method of the PerformanceObserver interface returns the current list of performance entries 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 | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
takeRecords |
65 | 79 | 60 | No | 52 | 15 | 65 | 65 | 60 | 47 | 15 | 9.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/PerformanceObserver/takeRecords