index.md

title	short-title	slug	page-type	status	browser-compat
IdleDetector: start() method	start()	Web/API/IdleDetector/start	web-api-instance-method	experimental	api.IdleDetector.start

{{securecontext_header}}{{APIRef("Idle Detection API")}}{{SeeCompatTable}}

The start() method of the {{domxref("IdleDetector")}} interface returns a {{jsxref("Promise")}} that resolves when the detector starts listening for changes in the user's idle state. This method takes an optional options object with the threshold in milliseconds where inactivity should be reported and signal for an AbortSignal to abort the idle detector.

Syntax

start()
start(options)

Parameters

• options {{optional_inline}}
  • : An object with the following properties:
    • threshold
      • : The minimum number of idle milliseconds before reporting should begin.
    • signal
      • : A reference to an {{domxref('AbortSignal')}} instance allowing you to abort idle detection.

Return value

A {{jsxref("Promise")}}.

Exceptions

• NotAllowedError {{domxref("DOMException")}}
  • : Use of this feature was blocked by a Permissions Policy.

Examples

The following example shows how to start idle detection using the options argument. It retrieves an instance of AbortSignal from an instance of {{domxref("AbortController")}}.

const controller = new AbortController();
const signal = controller.signal;

await idleDetector.start({
  threshold: 60_000,
  signal,
});
console.log("IdleDetector is active.");

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}