DeviceLightEvent

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The DeviceLightEvent provides web developers with information from photo sensors or similiar detectors about ambient light levels near the device. For example this may be useful to adjust the screen's brightness based on the current ambient light level in order to save energy or provide better readability.

Properties

DeviceLightEvent.value: The level of the ambient light in lux.

Example

window.addEventListener('devicelight', function(event) {
  console.log(event.value);
});

Specifications

No specification.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`DeviceLightEvent` ExperimentalNon-standard	Chrome No support No	Edge Full support Yes	Firefox Full support 62 Notes Disabled Full support 62 Notes Disabled Notes See bug 1462308. Disabled From version 62: this feature is behind the `device.sensors.ambientLight.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support 22 — 61 Notes Notes Not supported for MacBook with Touch Bar and Windows 7 (see bug 754199).	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 62 Notes Disabled Full support 62 Notes Disabled Notes See bug 1462308. Disabled From version 62: this feature is behind the `device.sensors.ambientLight.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support 15 — 61	Opera Android No support No	Safari iOS No support No	Samsung Internet Android ?
`value` ExperimentalNon-standard	Chrome No support No	Edge Full support 13	Firefox Full support 62 Notes Disabled Full support 62 Notes Disabled Notes See bug 1462308. Disabled From version 62: this feature is behind the `device.sensors.ambientLight.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support 22 — 61 Notes Notes Not supported for MacBook with Touch Bar and Windows 7 (see bug 754199).	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android Full support 62 Notes Disabled Full support 62 Notes Disabled Notes See bug 1462308. Disabled From version 62: this feature is behind the `device.sensors.ambientLight.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. No support 15 — 61	Opera Android No support No	Safari iOS No support No	Samsung Internet Android ?

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.: Non-standard. Expect poor cross-browser support.
See implementation notes.: See implementation notes.
User must explicitly enable this feature.: User must explicitly enable this feature.