PerformanceObserverEntryList

The PerformanceObserverEntryList interface is a list of peformance events that were explicitly observed via the observe() method.

Note: this interface is exposed to Window and Worker.

Methods

PerformanceObserverEntryList.getEntries()

Returns a list of explicitly observed PerformanceEntry objects based on the given filter.

PerformanceObserverEntryList.getEntriesByType()

Returns a list of explicitly observed PerformanceEntry objects of the given entry type.

PerformanceObserverEntryList.getEntriesByName()

Returns a list of explicitly observed PerformanceEntry objects based on the given name and entry type.

Example

// Create observer for all performance event types
// list is of type PerformanceObserveEntryList
var observe_all = new PerformanceObserver(function(list, obs) {
   var perfEntries = list.getEntries();
   for (var i = 0; i < perfEntries.length; i++) {
      print_perf_entry(perfEntries[i]);
      // do something with it
   }
})

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
PerformanceObserverEntryList
52
79
57
No
39
11
No
52
57
41
11
6.0
getEntries
52
79
57
No
39
No
No
52
57
41
No
6.0
getEntriesByName
52
79
57
No
39
No
No
52
57
41
No
6.0
getEntriesByType
52
79
57
No
39
No
No
52
57
41
No
6.0

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/PerformanceObserverEntryList