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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

Browser compatibility浏览器兼容性

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.

See also 也可以看看

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