This API is available on Firefox OS for internal applications only.
The MozPowerManager.getWakeLockState() method is used to retrieve the current lock state of a given resource.
Syntax
MozPowerManager.getWakeLockState(resourceName);
Parameters
resourceName- A string that represent the name of the resource to check.
Return value
This method will return a string that represents the current lock state for the resource. Possible values for this state are:
unlocked- Nobody holds the wake lock.
locked-foreground- At least one window holds the wake lock and is visible.
locked-background- At least one window holds the wake lock, but all of them are hidden.
Example
var state = navigator.mozPower.getWakeLockState('screen')
console.log('screen: ' + state);
Specifications
Not part of any specification.