The takeRecords()
method of the PerformanceObserver
interface returns the current list of performance entries
stored in the performance observer, emptying it out.
Syntax
var PerformanceEntry[] = performanceObserver.takeRecords();
Parameters
None.
Return value
A list of PerformanceEntry
objects.
Example
var observer = new PerformanceObserver(function(list, obj) { var entries = list.getEntries(); for (var i=0; i < entries.length; i++) { // Process "mark" and "frame" events } }); observer.observe({entryTypes: ["mark", "frame"]}); var records = observer.takeRecords(); console.log(records[0].name); console.log(records[0].startTime); console.log(records[0].duration);
Specifications
Specification | Status | Comment |
---|---|---|
Performance Timeline Level 2 The definition of 'takeRecords()' in that specification. |
Candidate Recommendation | Initial definition of takeRecords() method. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
takeRecords | Chrome Full support 65 | Edge Full support ≤79 | Firefox Full support 60 | IE No support No | Opera Full support Yes | Safari No support No | WebView Android Full support 65 | Chrome Android Full support 65 | Firefox Android Full support 60 | Opera Android Full support Yes | Safari iOS No support No | Samsung Internet Android Full support 9.0 |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.