在此页

• 句法
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

过时
This feature is obsolete.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 dischargingtimechange events. These events occur when the battery dischargingTime is updated.

句法

battery.ondischargingtimechange = funcRef
					

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

范例

HTML 内容

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

JavaScript Content

navigator.getBattery().then(function(battery) {
    battery.ondischargingtimechange = dischargingTimeChange;
    function dischargingTimeChange(){
        document.querySelector('#level').textContent = battery.level;
        document.querySelector('#chargingTime').textContent = battery.chargingTime;
    }
});
					

规范

规范	状态	注释
Battery Status API	候选推荐	初始定义

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
ondischargingtimechange 弃用	Chrome 38	Edge 79	Firefox 16 — 52 不支持 16 — 52 不支持 10 — 16 Prefixed Prefixed Implemented with the vendor prefix: moz 52 Disabled 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 provides support for the deprecated navigator.battery . Disabled From version 52: this feature is behind the dom.battery.enabled preference. To change preferences in Firefox, visit about:config. 72 From this version onwards, BatteryManager is only available in chrome/privileged code.	IE No	Opera 25	Safari No	WebView Android 40	Chrome Android 38 38 Values for BatteryManager.chargingTime and BatteryManager.dischargingTime are always equal to Infinity .	Firefox Android 10 — 16 Prefixed 不支持 10 — 16 Prefixed Prefixed Implemented with the vendor prefix: moz 不支持 16 — 52 Disabled 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 provides support for the deprecated navigator.battery . Disabled From version 16 until version 52 (exclusive): this feature is behind the dom.battery.enabled preference. To change preferences in Firefox, visit about:config.	Opera Android 25	Safari iOS ? — ?	Samsung Internet Android 3.0 3.0 Values for BatteryManager.chargingTime and BatteryManager.dischargingTime are always equal to Infinity .

图例

完整支持

完整支持

不支持

不支持

弃用。不要用于新网站。

弃用。不要用于新网站。

见实现注意事项。

用户必须明确启用此特征。

用户必须明确启用此特征。

要求使用供应商前缀或不同名称。

要求使用供应商前缀或不同名称。

另请参阅

• BatteryManager
• Navigator.getBattery

元数据

• 最后修改： 2019 年 3 月 23 日

相关话题

1. Battery Status API
2. BatteryManager
3. 特性

   1. charging
   2. chargingTime
   3. dischargingTime
   4. level
   5. onchargingchange
   6. onchargingtimechange
   7. ondischargingtimechange
   8. onlevelchange
4. 继承：

   1. EventTarget
5. Related pages for Battery API

   1. Navigator.battery
   2. Navigator.getBattery()