项目中，会遇到有过期时间的倒计时，使用方法如下：
export default {
data() {
return {
day: 0, //天
hour: 0, //时
minute: 0,//分
second: 0,//秒
timer: null,
expireat: '2022-05-01',//过期时间
};
},
methods: {
countDown(time) { //倒计时
const _this = this;
if (!time) {
return
}
let secondes = time;
this.timer = setInterval(() => {
let now = new Date().getTime();
if (now < secondes) {
let diff = parseInt((secondes - now) / 1000); //相差多少秒
let s = diff % 60; //秒
let m = parseInt(diff / 60); //分钟
let h = 0;//小时
let d = 0; //天
if (m > 60) {
h = parseInt(m / 60);
m = m % 60;
}
if (h > 24) {
d = parseInt(h / 24);
h = h % 24;
}
if (d >= 0) {
d = d < 10 ? '0' + d : d
}
if (h >= 0) {
h = h < 10 ? '0' + h : h
}
if (h >= 0 || m >= 0) {
m = m < 10 ? '0' + m : m
}
s = s < 10 ? '0' + s : s,
//时分秒赋值
this.day= d
this.hour= h
this.minute= m
this.second= s
} else {
this.clearTimer()
}
}, 1000)
},
clearTimer() {
clearInterval(this.timer);
this.timer= null
},
},
mounted() {
let etimer = new Date(this.expireat).getTime(); //获取过期日期的时间戳
this.countDown(etimer)
},
destroyed() {
this.clearTimer()
}
}
html显示：
<div>
{{d}}天 {{h}}时 {{m}} 分{{s}}秒
</div>
