JavaScript实现简单网页时钟

利用JavaScript实现网页时钟,效果如下图所示:

首先在body中完成表盘、指针的资源载入:

<div><img src="../../image/clockface.jpg" alt=""></div>
<hr id="hour" >
<hr id="min">
<hr id="second">

设置CSS样式:

<style>
      body{
          margin: 0;
      }
      div{
          margin: 0 auto;
          width: 600px;
          height: 600px;
      }
      #hour{
          background-color: black;
          width: 130px;
          height: 10px;
          position: fixed;
          top: 295px;
          left: 50%;
          margin-left: -65px;
      }
      #min{
          background-color: red;
          width: 200px;
          height: 8px;
          position: fixed;
          top: 296px;
          left: 50%;
          margin-left: -100px;
      }
      #second{
          background-color: yellow;
          width: 270px;
          height: 5px;
          position: fixed;
          top: 297.5px;
          left: 50%;
          margin-left: -135px;
      }
</style>

最后是JS代码部分,使用循环定时器setInterval()每秒调用一次主函数,主函数内使用new Date()创建时间对象,分别使用 .getHours();.getMinutes();.getSeconds()获得当前的时分秒,然后利用CSS自带动画-旋转改变指针的角度:

setInterval(watch,1000);
var anjleSeconds=0,anjleMin=0,anjleHours=0;
function watch() {
      var Time= new Date();
      anjleSeconds=Time.getSeconds()/60*360+90;
      anjleMin=Time.getMinutes()/60*360+90;
      anjleHours=nowHours/12*360+90;
      document.getElementById("second").style.transform="rotate("+anjleSeconds+"deg)";
      document.getElementById("min").style.transform="rotate("+anjleMin+"deg)";
      document.getElementById("hour").style.transform="rotate("+anjleHours+"deg)";
  }

目前存在的问题是,时分秒指针由于使用的是hr标签表示,所以存在两端一样长的问题。

完整代码如下:

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
      body{
          margin: 0;
      }
      div{
          margin: 0 auto;
          width: 600px;
          height: 600px;
      }
      #hour{
          background-color: black;
          width: 130px;
          height: 10px;
          position: fixed;
          top: 295px;
          left: 50%;
          margin-left: -65px;
      }
      #min{
          background-color: red;
          width: 200px;
          height: 8px;
          position: fixed;
          top: 296px;
          left: 50%;
          margin-left: -100px;
      }
      #second{
          background-color: yellow;
          width: 270px;
          height: 5px;
          position: fixed;
          top: 297.5px;
          left: 50%;
          margin-left: -135px;
      }
  </style>
</head>
<body>
<div><img src="../../image/clockface.jpg" alt=""></div>
<hr id="hour" >
<hr id="min">
<hr id="second">
<script>
  setInterval(watch,1000);
  var anjleSeconds=0,anjleMin=0,anjleHours=0;
  function watch() {
      var Time= new Date();
      anjleSeconds=Time.getSeconds()/60*360+90;
      anjleMin=Time.getMinutes()/60*360+90;
      anjleHours=Time.getHours()/12*360+90;
      document.getElementById("second").style.transform="rotate("+anjleSeconds+"deg)";
      document.getElementById("min").style.transform="rotate("+anjleMin+"deg)";
      document.getElementById("hour").style.transform="rotate("+anjleHours+"deg)";
  }
</script>
</body>
</html>

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程宝库

function hellworld() { return "您好!美好世界!";}console.log(hellworld()); // 您好!美好世界!async funct ...