JS+CSS3 realizes clock effect (Tik Tok)

JS CSS3 to implement clock effect (Douyin)

This article tells about Douyin How to achieve the very popular clock effect, mainly using the original JS CSS3, I hope everyone can exchange and learn.

I won’t explain it in detail, please see the comments:

nbsp;html>


    <meta>
    <title>Title</title>
    <style>
        html{
            background: #000;
            color: #666;
            font-size: 12px;
            overflow:hidden;
        }
        *{
            margin: 0;
            padding: 0;
        }
        span{
            display: block;
            float: left;
        }
        .on{
            color: #fff;
        }
        .wrapper{
            width: 200px;
            height: 200px;
            position: absolute;
            left:50%;
            top:50%;
            margin-top: -100px;
            margin-left: -100px;
        }
        .wrapper .timebox{
            position: absolute;
            width: 200px;
            height: 200px;
            top: 0;
            left:0;
            border-radius: 100%;
            transition: all 0.5s;
        }
        .timebox span{
            transition: all 0.5s;
            float: left;
        }
        .wrapper  .timebox span{
            position: absolute;
            left:50%;
            top:50%;
            width: 40px;
            height: 18px;
            margin-top: -9px;
            margin-left: -20px;
            text-align: right;
        }

    </style>



<p>
    </p><p></p>
    <p></p>
    <p></p>
    <p></p>
    <p></p>



<script>

    let wrapper = document.getElementById("wrapper");
    let yueBox = document.getElementById("yueBox");
    let riqiBox = document.getElementById("riqiBox");
    let hourbox = document.getElementById("hourbox");
    let minutebox = document.getElementById("minutebox");
    let secondbox = document.getElementById("secondbox");

    /*
    * 找所有的东西标签函数
    * */
    let findSiblings = function( tag ){
        let parent = tag.parentNode;
        let childs = parent.children;
        let sb = [];
        for(let i=0 ; i <= childs.length-1 ; i++){
            if( childs[i]!==tag){
                sb[sb.length] = childs[i];
            }
        }
        return  sb ;
    };

    /*
    * 去掉所有兄弟的类
    * */
    let removeSiblingClass =function( tag ){
        let sb = findSiblings( tag );
        for(let i=0 ;  i <= sb.length-1 ; i++){
            sb[i].className = "";
        }
    };

    /*
    * 初始化月份函数
    * */
    let initMonth = function(){
      for(let i=1; i<=12; i++){
            let span = document.createElement("span");
            span.innerHTML = i+"月";
            yueBox.appendChild( span );
      }
    };

    // 初始化日期
    let initDate = function(){
        for(let i=1; i<=31; i++){
            let span = document.createElement("span");
            span.innerHTML = i+"日";
            riqiBox.appendChild( span );
        }
    };

    // 初始化小时，分钟，秒
    let initHour = function(){
        for(let i=0; i<=23; i++){
            let h = i ;
            let span = document.createElement("span");
            if( h<10){
                h="0"+h;
            }
            span.innerHTML = h +"点";
            hourbox.appendChild( span );
        }
    };
    let initMinute = function(){
        for(let i=0; i<=59; i++){
            let  f = i ;
            let span = document.createElement("span");
            if( f<10){
                f="0"+f;
            }
            span.innerHTML = f +"分";
            minutebox.appendChild( span );
        }
    };
    let initSecond = function(){
        for(let i=0; i<=59; i++){
            let  miao = i ;
            let span = document.createElement("span");
            if( miao<10){
                miao="0"+miao;
            }
            span.innerHTML = miao +"秒";
            secondbox.appendChild( span );
        }
    };

    // 时间文字样式切换函数
    let changeTime = function(tag){
        tag.className = "on";
        removeSiblingClass( tag );
    };

    /*
    * 初始化日历函数
    * */
    let initRili = function(){
        initMonth(); // 初始化月份
        initDate(); // 初始化日期
        initHour(); // 小时
        initMinute();
        initSecond();
    };

    /*
    * 展示当前时间
    * 参数：mydate 时间对象
    * */
    let  showNow = function( mydate ){

        let yue = mydate.getMonth() ;
        let riqi = mydate.getDate();
        let hour = mydate.getHours()  ;
        let minute = mydate.getMinutes();
        let second = mydate.getSeconds();
        // 时间文字样式切换函数
        changeTime( yueBox.children[yue] );
        changeTime( riqiBox.children[riqi-1] );
        changeTime( hourbox.children[hour] );
        changeTime( minutebox.children[minute] );
        changeTime( secondbox.children[second] );

    };

    // 展示时间圆圈函数
    // tag：目标
    // num：数字数量
    // dis：圆圈半径
    let textRound = function(tag,num,dis){
        let span = tag.children ;
        for(let i=0 ; i<=span.length-1; i++){
            span[i].style.transform="rotate("+ (360/span.length)*i+"deg)  translateX("+dis+"px)" ;
        }
    };
    /*
    * 旋转指定“圆圈”指定度数
    * */
    let rotateTag = function(tag , deg){
        tag.style.transform = "rotate("+deg+"deg)";
    };

    let main = function(){
        initRili(); // 初始化日历

        setInterval(function(){
            let mydate = new Date();
            showNow( mydate ); // 展示当前时间
        },1000);

        //  n秒后，摆出圆形
        setTimeout(function(){
            wrapper.className = "wrapper";
            textRound(yueBox,12,40);
            textRound(riqiBox,31,80);
            textRound(hourbox,24,120);
            textRound(minutebox,60,160);
            textRound(secondbox,60,200);
            setInterval(function(){
                let mydate = new Date();
                rotateTag( yueBox , -30*mydate.getMonth());
                rotateTag( riqiBox , -360/31*(mydate.getDate()-1) );
                rotateTag( hourbox , -360/24*mydate.getHours());
                rotateTag( minutebox , -6*mydate.getMinutes());
                rotateTag( secondbox , -6*mydate.getSeconds());
            },1000)
        },6000)

    };
    main();
   
</script>

Thank you for reading, have you learned it?

This article is reproduced from: https://blog.csdn.net/weixin_42703239/article/details/105012665

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