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JS小钟表功能 原生JS实现的简单小钟表功能示例

邹大叔 人气:0

本文实例讲述了原生JS实现的简单小钟表功能。分享给大家供大家参考,具体如下:

先来看看运行效果:

完整代码:

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>www.qb5200.com 钟表</title>
    <style type="text/css">
      body {
       background-color:#00A2D4;
      }
      .clock {
        width: 200px;
        height: 200px;
        background: -webkit-radial-gradient(#3b3b3b, #000);
        background: radial-gradient(#2E3F50, #0E1B29);
        box-shadow: inset 0px 0px 30px #131313, 0px 2px 18px rgba(0,0,0,0.5);
        border: 6px solid #172839;
        border-radius: 106px;
        margin: auto;
        position: absolute;
        top: 0; bottom: 0; left: 0; right: 0;
      }
      .hour-hand {
        width: 4px;
        height: 55px;
        background: #fff;
        box-shadow: 0px 0px 7px #000;
        position: absolute;
        top: 45px;
        left: 98px;
      }
      .minute-hand {
        width: 4px;
        height: 80px;
        background: #fff;
        box-shadow: 0px 0px 4px #000;
        position: absolute;
        top: 20px;
        left: 98px;
      }
      .second-hand {
        width: 2px;
        height: 80px;
        background: #bbb;
        box-shadow: 0px 0px 7px #000;
        position: absolute;
        top: 20px;
        left: 99px;
      }
      .pin {
        width: 10px;
        height: 10px;
        background: #222;
        border-radius: 10px;
        margin: auto;
        position: absolute;
        top: 0; bottom: 0; left: 0; right: 0;
      }
      .hour-hand,
      .minute-hand,
      .second-hand {
        -webkit-transform-origin: 50% 100%;
        -moz-transform-origin: 50% 100%;
        -o-transform-origin: 50% 100%;
        -ms-transform-origin: 50% 100%;
        transform-origin: 50% 100%;
      }
      .circle{
        width:20px;
        height:20px;
        line-height:20px;
        text-align:center;
        color:#fff;
        position: absolute;
      }
    </style>
  </head>
  <body>
    <div class="clock">
      <div class="minute-hand"></div>
      <div class="hour-hand"></div>
      <div class="second-hand"></div>
      <div class="pin"></div>
      <div class="circle">6</div>
      <div class="circle">5</div>
      <div class="circle">4</div>
      <div class="circle">3</div>
      <div class="circle">2</div>
      <div class="circle">1</div>
      <div class="circle">12</div>
      <div class="circle">11</div>
      <div class="circle">10</div>
      <div class="circle">9</div>
      <div class="circle">8</div>
      <div class="circle">7</div>
    </div>
    <div class="time"></div>
    <script type="text/javascript">
      window.onload=function(){
        setInterval(function(){
          var dt = new Date();
          var sec_deg = dt.getSeconds() * (360/60);
          var min_deg = dt.getMinutes() * (360/60);
          var hr_deg = dt.getHours() * (360/12) + dt.getMinutes() * (360/60/12);
          document.querySelector(".clock .second-hand").style.cssText='-webkit-transform:rotate(' + sec_deg + 'deg)','-moz-transform:rotate(' + sec_deg + 'deg)', '-o-transform:rotate(' + sec_deg + 'deg)', '-ms-transform:rotate(' + sec_deg + 'deg)', 'transform:rotate(' + sec_deg + 'deg)';
          document.querySelector('.clock .minute-hand').style.cssText='-webkit-transform:rotate(' + min_deg + 'deg)', '-moz-transform:rotate(' + min_deg + 'deg)', '-o-transform:rotate(' + min_deg + 'deg)', '-ms-transform:rotate(' + min_deg + 'deg)', 'transform:rotate(' + min_deg + 'deg)';
          document.querySelector('.clock .hour-hand').style.cssText='-webkit-transform:rotate(' + hr_deg + 'deg)', '-moz-transform:rotate(' + hr_deg + 'deg)', '-o-transform:rotate(' + hr_deg + 'deg)', '-ms-transform:rotate(' + hr_deg + 'deg)', 'transform:rotate(' + hr_deg + 'deg)';
         }, 1000);
        var dx=90,
          dy=90,
          s=87,//半径
          x=Math.sin(0),
          y=Math.cos(0),
          dig=2*Math.PI/12;
        var circle=document.querySelectorAll(".circle");
        for(var i=0;i<12;i++){
          var x=Math.sin(i*dig);
          var y=Math.cos(i*dig);
          var topValue=Number(dy+y*s),
            leftValue=Number(dx+x*s);
          circle[i].style.top=topValue+"px";
          circle[i].style.left=leftValue+"px";
        }
      }
    </script>
  </body>
</html>

感兴趣的朋友可使用在线HTML/CSS/JavaScript代码运行工具http://tools.softyun.net/code/HtmlJsRun测试一下运行效果。

PS:这里再为大家推荐几款时间及日期相关工具供大家参考使用:

在线日期/天数计算器:
http://tools.softyun.net/jisuanqi/date_jisuanqi

在线日期计算器/相差天数计算器:
http://tools.softyun.net/jisuanqi/datecalc

在线日期天数差计算器:
http://tools.softyun.net/jisuanqi/onlinedatejsq

Unix时间戳(timestamp)转换工具:
http://tools.softyun.net/code/unixtime

希望本文所述对大家JavaScript程序设计有所帮助。

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