BatteryManager.onlevelchange

Specifies an event listener to receive levelchange events. These events occur when the battery level is updated.

Syntax

navigator.battery.onlevelchange = funcRef

Where battery is a BatteryManager object, and funcRef is a function to be called when the levelchange event occurs.

Example

HTML Content

<div id="level">(battery level unknown)</div>
<div id="stateBaterry">(charging state unknown)</div>

JavaScript Content

navigator.getBattery().then(function(battery) {
    battery.onlevelchange = function(){
        document.querySelector('#level').textContent = battery.level;

        if(battery.charging)
            document.querySelector('#stateBaterry').textContent = "Charging time: " + (battery.chargingTime / 60);
        else
            document.querySelector('#stateBaterry').textContent = "Discharging time: " + (battery.dischargingTime / 60);
    };
});

Specifications

Browser compatibility

See also

• BatteryManager
• Navigator.getBattery