Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The change event of the IdleDetector interface fires when the value of userState or screenState has changed.
IdleDetector: change event
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener('change', event => { }); onchange = event => { };
Event type
A generic Event.
Example
In the following example, the change callback prints the status of userState and screenState to the console.
idleDetector.addEventListener('change', () => { const userState = idleDetector.userState; const screenState = idleDetector.screenState; console.log(`Idle change: ${userState}, ${screenState}.`); });
Specifications
| Specification |
|---|
| Idle Detection API # api-idledetector-onchange |
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 | |
change_event |
94
|
94
|
No
|
No
|
80
|
No
|
94
|
94
|
No
|
66
|
No
|
17.0
|
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https://developer.mozilla.org/en-US/docs/Web/API/IdleDetector/change_event
