This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
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.
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