js计算相对时间

/**

* @description

* 时分秒倒计时

* @param {Number} second -参数秒

* @returns {Object} {d,h,m,s} -返回对象{d, h,m,s}

*/

 

export function countTime (second) {

let d = null

let h = null

let m = null

let s = null

//时间差

var leftTime = second;

//定义变量 d,h,m,s保存倒计时的时间

if (leftTime >= 0) {

d = Math.floor(leftTime / 60 / 60 / 24);

h = Math.floor(leftTime / 60 / 60 % 24);

m = Math.floor(leftTime / 60 % 60);

s = Math.floor(leftTime % 60);

}

h = String(h)?.padStart(2, 0)

m = String(m)?.padStart(2, 0)

s = String(s)?.padStart(2, 0)

return { d, h, m, s }

}