BatteryManager:level 属性

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

安全上下文: 此项功能仅在一些支持的浏览器安全上下文(HTTPS)中可用。

BatteryManager 接口的 level 只读属性以 0.01.0 之间的值表示电池当前的电量。值 0.0 表示电池的电量耗尽且系统即将暂停。值 1.0 表示电池已充满或用户代理无法报告电池状态信息。当其值发生变化时,会触发 levelchange 事件。

一个数字。

示例

获取电池电量

HTML

html
<button id="get-level">获取电池电量</button>
<div id="output"></div>

JavaScript

js
const getLevel = document.querySelector("#get-level");
const output = document.querySelector("#output");

getLevel.addEventListener("click", async () => {
  if (!navigator.getBattery) {
    output.textContent = "不支持电池管理器";
  } else {
    const manager = await navigator.getBattery();
    const level = manager.level;
    output.textContent = `电池电量:${level}`;
  }
});

结果

规范

Specification
Battery Status API
# dom-batterymanager-level

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
level

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support

参见