This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
The disconnect() method of the PerformanceObserver interface is used to stop the performance observer from receiving any performance entry events.
Syntax
observer.disconnect();
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"]});
function perf_observer(list, observer) {
// Process the "measure" event
// ...
// Disable additional performance events
observer.disconnect();
}
var observer2 = new PerformanceObserver(perf_observer);
observer2.observe({entryTypes: ["measure"]});
Specifications
| Specification | Status | Comment |
|---|---|---|
| Performance Timeline Time Level 2 The definition of 'disconnect()' in that specification. |
Editor's Draft | Initial definition of disconnect() method. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 52.0 | 49 (49)[1] | No support | 39 | No support |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|
| Basic support | No support | No support | 49 (49)[1] | No support | No support |
39 |
No support | 52.0 |
[1] Only activated in Nightly builds. Controlled by the dom.enable_performance_observer preference.