js 元旦倒计时

1、如图：

2、js实现

export function countDown() {
    var nowDate = new Date(); // 实时日期
    var nextYear = new Date(nowDate.getFullYear() + 1 +'/1/1'); // 明年的一月一日
    var timediff = Math.round((nextYear - nowDate) / 1000);     // 时间差
    var d = parseInt(timediff / 3600 / 24); // 天数
    var h = parseInt(timediff / 3600 % 24); // 小时
    var m = parseInt(timediff / 60 % 60);   // 分钟
    var s = parseInt(timediff % 60);        // 秒
    return {
        day: d,
        hosur: h,
        minute: m,
        second: s
    };
}

3、vue模板实现：

<div>
    距离明年元旦还有：
    <span class="count_down">{{countDown.day}}</span> 天 
    <span class="count_down"> {{countDown.hosur}}</span> 时 
    <span class="count_down"> {{countDown.minute}}</span> 分 
    <span class="count_down"> {{countDown.second}}</span> 秒
</div>
<script>
import { countDown } from '../../public/js/你的js文件.js'
export default {
    data() {
        return {
        countDown:[]
        }
    },
    created() {
        let that = this;
        setInterval(()=>{
            that.countDown = countDown();
        },1000);//元旦倒计时
        //console.log(Years());
    },
}
</script>

网站运行记录

<span id="runTime"></span>
<script type="text/javascript">
    function showTime(){
        window.setTimeout("showTime()",1000);
        let startDate = new Date("2018-12-24");
        let nowDate = new Date();
        let timeDiff = Math.round((nowDate- startDate)/ 1000);
        let d = parseInt(timeDiff / 3600 / 24);
        let h = parseInt(timeDiff / 3600 % 24); 
        let m = parseInt(timeDiff / 60 % 60);   
        let s = parseInt(timeDiff % 60);        
        document.getElementById("runTime").innerHTML = "本站已运行: "+d+"天"+h+"小时"+m+"分"+s+"秒";
    }
    showTime();
</script>

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