DeviceLightEvent - Web APIs 编辑

Obsolete

This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.

Experimental

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

BCD tables only load in the browser

See also

• devicelight
• Using Light Events