value property of
DeviceProximityEvent objects provides the current distance between the device and the detected object, in centimeters.
var distance = instanceOfDeviceProximityEvent.value;
A positive number representing a distance in centimeters (cm) between the device's proximity sensor and the detected object.
The definition of 'Proximity Events' in that specification.
|Working Draft||Initial specification|
|Feature||Android webview||Chrome for Android||Edge mobile||Firefox for Android||Opera Android||iOS Safari||Samsung Internet|
15 — 61
1. See bug 1462308.
2. From version 62: this feature is behind the
device.sensors.proximity.enabled preference (needs to be set to
true). To change preferences in Firefox, visit about:config.