BatteryManager.onchargingchange

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This feature is obsolete.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.

Specifies an event listener to receive chargingchange events. These events occur when the battery charging state is updated.

Syntax

battery.onchargingchange = funcRef

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

Example

HTML Content

<div id="level">(battery level unknown)</div>
<div id="chargingTime">(charging time unknown)</div>

JavaScript Content

navigator.getBattery().then(function(battery) {

   battery.onchargingchange = chargingChange();

   function chargingChange() {
      document.querySelector('#level').textContent = battery.level;
      document.querySelector('#chargingTime').textContent = battery.chargingTime;
   }
});

Specifications

Specification Status Comment
Battery Status API Candidate Recommendation Initial definition

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support38 ?

16 — 52

10 — 16 moz

521 2

523

No25 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support40386 No

10 — 16 moz

16 — 524 5

523

25 Yes —? Yes

1. Disabled by default in Firefox 10, but can be enabled setting the preference dom.battery.enabled to true. Starting with Firefox 11, mozBattery is enabled by default. The Battery API is currently supported on Android, Windows, and Linux with UPower installed. Support for MacOS is available starting with Firefox 18. Firefox also provide support for the deprecated navigator.battery.

2. From version 52: this feature is behind the dom.battery.enabled preference. To change preferences in Firefox, visit about:config.

3. From this version onwards, the Battery Status API is only available in chrome/privileged code.

4. Disabled by default in Firefox 10.0, but can be enabled setting the preference dom.battery.enabled to true. Starting with Firefox 11.0, mozBattery is enabled by default. The Battery API is currently supported on Android, Windows, and Linux with UPower installed. Support for MacOS is available starting with Gecko 18.0 (Firefox 18.0 / Thunderbird 18.0 / SeaMonkey 2.15). Firefox also provide support for the deprecated navigator.battery.

5. From version 16 until version 52 (exclusive): this feature is behind the dom.battery.enabled preference. To change preferences in Firefox, visit about:config.

6. Values for BatteryManager.chargingTime and BatteryManager.dischargingTime are always equal to Infinity.

See also

Document Tags and Contributors

 Last updated by: fscholz,