PerformanceObserver: takeRecords() method
The takeRecords() method of the PerformanceObserver interface returns the current list of performance entries stored in the performance observer, emptying it out.
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
| Specification |
|---|
| Performance Timeline # dom-performanceobserver-takerecords |
Browser compatibility
| desktop | mobile | server | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
takeRecords | |||||||||||||