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A Boolean value indicating whether or not the device's battery is currently being charged.
Syntax 句法
var charging = battery.charging
On return, charging indicates whether or not the battery, which is a BatteryManager object, is currently being charged; if the battery is charging, this value is true. Otherwise, the value is false.
Example 例子
HTML Content （内容）
<div id="charging">(charging state unknown)</div>
JavaScript 内容
navigator.getBattery().then(function(battery) {
var charging = battery.charging;
document.querySelector('#charging').textContent = charging ;
});
Specifications 规格
| Specification | Status | Comment |
|---|---|---|
| Battery Status API | Candidate Recommendation | Initial definition |
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| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 39.0 | 10 (10) moz 16 (16)[1] 52 (52)[3] |
未实现 | 25 | 未实现 |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | 未实现 | 40.0 | 10.0 (10) moz 16.0 (16)[1] 52.0 (52)[3] |
未实现 | 25[2] | 未实现 | 42.0[2] |
[1] 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.
[2] Values for BatteryManager.chargingTime and BatteryManager.dischargingTime are always equal to Infinity.
[3] From Firefox 52 onwards, the Battery Status API is only available in chrome/privileged code.