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; // Print all entries perfEntries = list.getEntries(); for (var i=0; i < perfEntries.length; i++) { print_perf_entry(perfEntries[i]); // do something with it } }
Specifications
Specification | Status | Comment |
---|---|---|
Performance Timeline Time Level 2 The definition of 'PerformanceObserverEntryList' in that specification. |
Editor's Draft | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 52.0 | 57 (57) | No support | 39 | No support |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | No support | No support | 57.0 (57) | No support |
39 |
No support | 52.0 |