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This feature is obsolete.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.
Indicates the current battery charge level as a value between 0.0
and
1.0
.
Syntax
var level = battery.level
On return, level
is a number representing the system's battery charge
level scaled to a value between 0.0 and 1.0. A value of 0 means the
battery
, which is a BatteryManager
object, is empty
and the system is about to be suspended. A value of 1.0 means the battery is full. A
value of 1.0 is also returned if the implementation isn't able to determine the battery
charge level or if the system is not battery-powered.
Example
HTML Content
<div id="level">(battery level unknown)</div>
JavaScript Content
navigator.getBattery().then(function(battery) {
var level = battery.level;
document.querySelector('#level').textContent = level;
});
Specifications
Specification | Status | Comment |
---|---|---|
Battery Status API | Candidate Recommendation | Initial definition |
Browser compatibility
BCD tables only load in the browser