js控制电池

js控制电池

1. 判断设备是否在充电

   navigator.getBattery().then(function(battery){
       if(battery.charging) {
           alert("电池正在充电");
       }else {
           alert("电池没有充电");
       }
   })

2. 获取设备电量

   navigator.getBattery().then(function(battery){
       alert("电池电量" + battery.level * 100 + "%");
   })

3. 电池状态监听器

   navigator.getBattery().then(function(battery){
       battery.addEventListener("chargingchange", function() {
           console.log("电池状态：", battery.charging);
       })
   
       battery.addEventListener("levelchange", function() {
           console.log("电池电量：", battery.level * 100 + "%");
       })
   
       battery.addEventListener("chargingtimechange", function() {
           console.log("电池充满还需：", battery.chargingTime + "秒");
       })
   
       battery.addEventListener("dischargingtimechange", function() {
           console.log("电池电量还能支撑：", battery.dischargingTime + "秒");
       })
   })