MDN wants to learn about developers like you:

Find out when the user's system is idle, locked, or active.

To use this API you need to have the "idle" permission.



String describing the device's idle state.


Returns "locked" if the system is locked, "idle" if the user has not generated any input for a specified number of seconds, or "active" otherwise.
Sets the interval used to determine when the system is in an idle state for idle.onStateChanged events.


Fired when the system changes state.

Browser compatibility

ChromeEdgeFirefoxFirefox for AndroidOpera
IdleState Yes No4548 Yes
onStateChanged Yes No5151 Yes
queryState Yes1545 *48 * Yes
setDetectionInterval Yes155151 Yes


This API is based on Chromium's chrome.idle API. This documentation is derived from idle.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

Document Tags and Contributors

 Contributors to this page: wbamberg, abbycar, kmaglione
 Last updated by: wbamberg,