js+css3实现简单时钟特效

  • Z时代
  • 2024-01-10
  • 分类：IT

本文实例为大家分享了js+css3实现简单时钟的具体代码，供大家参考，具体内容如下

1.实现了时钟的特效，可以转动，时间准确，画面美观大气；

2.用到了css3的transform: rotate，transform-origin:,伪元素，border-radius，定位，z-index等等

效果如图：

代码如下：

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title>CSS3时钟特效</title>
 <link rel="shortcut icon" type="image/x-icon" href="img/an.ico" />
 <style>
  /*表盘边框*/
  .clock {
  /* 设置大小 */
  width: 400px;
  height: 400px;
  position: relative;
  margin: 40px auto;
  /*上边距*/
  border-radius: 50%;
  /*圆形*/
  box-shadow: 5px 5px 20px rgba(0, 0, 0, 0.5);
  /*表盘阴影*/
  background: #F5DEB3;
  border: 10px solid #FFFF00;
  }
  /*画刻度的面板*/
  .box {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  }
  /*用来装刻度和数字的div*/
  .box div {
  width: 0px;
  height: 200px;
  position: absolute;
  left: 200px;
  /*旋转*/
  transform: rotate(0deg);
  /*设置基点为右下角*/
  transform-origin: bottom right;
  background: rgba(255, 0, 0, 0.5);
  }
  /*数字*/
  .box div i {
  float: left;
  margin-top: 20px;
  margin-left: -10px;
  font-style: normal;
  width: 20px;
  text-align: center;
  font-style: 18px;
  }
  /*小刻度*/
  .box div::after {
  content: "";
  position: absolute;
  background: #484848;
  width: 2px;
  height: 10px;
  left: -1px;
  }
  /*大刻度*/
  .box div.five::after {
  position: absolute;
  content: "";
  width: 4px;
  height: 20px;
  left: -2px;
  top: 0;
  background: #484848;
  border-radius: 0 0 2px 2px;
  }
  /*秒针样式*/
  .second {
  width: 1px;
  height: 200px;
  background: red;
  position: absolute;
  left: 200px;
  /*距离表盘宽度一半*/
  margin-top: 30px;
  z-index: 10;
  transform: rotate(0deg);
  transform-origin: center 170px;
  /*定位旋转位置*/
  }
  /*圆心样式*/
  .second::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  background: red;
  border-radius: 50%;
  bottom: 20px;
  left: -10px;
  }
  /*分针样式*/
  .minute {
  width: 2px;
  height: 140px;
  background: #8b8b8d;
  position: absolute;
  left: 199px;
  margin-top: 60px;
  z-index: 9;
  transform-origin: center bottom;
  transform: rotate(12deg);
  animation: minute 60s linear infinite;
  }
  /*时针样式*/
  .hour {
  width: 6px;
  height: 100px;
  background: #333;
  position: absolute;
  left: 197px;
  margin-top: 100px;
  z-index: 8;
  border-radius: 3px;
  transform: rotate(2deg);
  transform-origin: center bottom;
  animation: minute 60s linear infinite;
  }
 </style>
 </head>
 <body>
 <div class="clock">
  <div class="box"></div>
  <div class="second"></div>
  <div class="minute"></div>
  <div class="hour"></div>
 </div>
 <script>
  var box = document.getElementsByClassName("box")[0];
  var ssObj = document.getElementsByClassName("second")[0];
  var mmObj = document.getElementsByClassName("minute")[0];
  var hhObj = document.getElementsByClassName("hour")[0];
  /*获取当前时间*/
  var date = new Date();
  var hh = date.getHours();
  var mm = date.getMinutes();
  var ss = date.getSeconds();
  /*计算页面指针加载时的角度*/
  hhDeg = 360 * (hh % 12) / 12;
  mmDeg = 360 * mm / 60;
  ssDeg = 360 * ss / 60;
  hhObj.style.transform = "rotate(" + hhDeg + "deg)";
  mmObj.style.transform = "rotate(" + mmDeg + "deg)";
  ssObj.style.transform = "rotate(" + ssDeg + "deg)";
      // 定义初始刻度的度数
  var Deg = 0;
  /*画刻度*/
  for (var i = 0; i < 60; i++) {
  var div1 = document.createElement("div"); //创建一个div
  var hourNum = i / 5;
  //当为5时
  if (hourNum == 0) hourNum = 12;
  if (i % 5 == 0) { //大刻度
   div1.className = "five";
   div1.innerHTML = "<i>" + hourNum + "</i>"
  }
  div1.style.transform = "rotate(" + Deg + "deg)";
  box.appendChild(div1);
  Deg += 6;// 每两个刻度之间是6度
  }
  /*指针转动的函数*/
  function drawSS() {
  // 秒针的度数
  ssDeg = 360 * ss / 60;
  // 分针的度数
  mmDeg1 = 360 * mm / 60;
  // 时针的度数
  hhDeg1 = 360 * (hh % 12) / 12;
  // 分针每秒走的位置
  mmDeg = mmDeg1 + (6 * ss / 60);
  // 时针每分钟走的位置
  hhDeg = hhDeg1 + (30 * mm / 60);
  hhObj.style.transform = "rotate(" + hhDeg + "deg)";
  mmObj.style.transform = "rotate(" + mmDeg + "deg)";
  ssObj.style.transform = "rotate(" + ssDeg + "deg)";
  ss += 1;
  if (ss > 60) {
   ss = 1;
   mm += 1;
  }
  if (mm == 60) {
   mm = 0;
   hh += 1;
  }
  setTimeout(function() {
   drawSS();
  }, 1000);
  }
  drawSS();
 </script>
 </body>
</html>

精简版：

<!DOCTYPE html>
<html>
 <head>
 <meta charset="UTF-8">
 <title>CSS3时钟特效</title>
 <link rel="shortcut icon" type="image/x-icon" href="img/an.ico" />
 <style>
  /*表盘边框*/
  .clock {
  /* 设置大小 */
  width: 400px;
  height: 400px;
  position: relative;
  margin: 40px auto;
  /*上边距*/
  border-radius: 50%;
  /*圆形*/
  box-shadow: 5px 5px 20px rgba(0, 0, 0, 0.5);
  /*表盘阴影*/
  background: #F5DEB3;
  border: 10px solid #FFFF00;
  }
  /*画刻度的面板*/
  .box {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  }
  /*用来装刻度的div*/
  .box div {
  width: 0px;
  height: 200px;
  position: absolute;
  left: 200px;
  /*旋转*/
  transform: rotate(0deg);
  /*设置基点为右下角*/
  transform-origin: bottom right;
  background: rgba(255, 0, 0, 0.5);
  }
  /*小刻度*/
  .box div:after {
  content: "";
  position: absolute;
  background: #484848;
  width: 2px;
  height: 10px;
  left: -1px;
  }
  /*大刻度*/
  .box div.five:after {
  position: absolute;
  content: "";
  width: 4px;
  height: 20px;
  left: -2px;
  top: 0;
  background: #484848;
  border-radius: 0 0 2px 2px;
  }
  /*秒针样式*/
  .second {
  width: 1px;
  height: 200px;
  background: red;
  position: absolute;
  left: 200px;
  /*距离表盘宽度一半*/
  margin-top: 30px;
  z-index: 10;
  transform: rotate(0deg);
  transform-origin: center 170px;
  /*定位旋转位置*/
  }
  /*圆心样式*/
  .second:after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  background: red;
  border-radius: 50%;
  bottom: 20px;
  left: -10px;
  }
  /*分针样式*/
  .minute {
  width: 2px;
  height: 140px;
  background: #8b8b8d;
  position: absolute;
  left: 199px;
  margin-top: 60px;
  z-index: 9;
  transform-origin: center bottom;
  transform: rotate(12deg);
  }
  /*时针样式*/
  .hour {
  width: 6px;
  height: 100px;
  background: #333;
  position: absolute;
  left: 197px;
  margin-top: 100px;
  z-index: 8;
  border-radius: 3px;
  transform: rotate(2deg);
  transform-origin: center bottom;
  }
 </style>
 </head>
 <body>
 <div class="clock">
  <div class="box"></div>
  <div class="second"></div>
  <div class="minute"></div>
  <div class="hour"></div>
 </div>
 <script>
  var box = document.getElementsByClassName("box")[0];
  var ssObj = document.getElementsByClassName("second")[0];
  var mmObj = document.getElementsByClassName("minute")[0];
  var hhObj = document.getElementsByClassName("hour")[0];
  /*获取当前时间*/
  var date = new Date();
  var hh = date.getHours();
  var mm = date.getMinutes();
  var ss = date.getSeconds();
  /*计算页面指针加载时的角度*/
  drawSS();
      // 定义初始刻度的度数
  var Deg = 0;
  /*画刻度*/
  for (var i = 0; i < 60; i++) {
  var div1 = document.createElement("div"); //创建一个div
  //当为5时
  if (i % 5 == 0) { //大刻度
   div1.className = "five";
  }
  div1.style.transform = "rotate(" + Deg + "deg)";
  box.appendChild(div1);
  Deg += 6;// 每两个刻度之间是6度
  }
  /*指针转动的函数*/
  function drawSS() {
  // 秒针的度数
  ssDeg = 360 * ss / 60;
  // 分针的度数
  mmDeg = 360 * mm / 60 + (6 * ss / 60);
  // 时针的度数
  hhDeg = 360 * (hh % 12) / 12 + (30 * mm / 60);
  // 旋转
  hhObj.style.transform = "rotate(" + hhDeg + "deg)";
  mmObj.style.transform = "rotate(" + mmDeg + "deg)";
  ssObj.style.transform = "rotate(" + ssDeg + "deg)";
  ss += 1;
  // 每秒钟调用一次
  setTimeout(function() {
   drawSS();
  }, 1000);
  }
 </script>
 </body>
</html>

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