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JS div匀速移动动画与变速移动动画代码实例

︶ㄣSDDLL学院 メ
SDDLL学院V管理员 / 阅读
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1.匀速移动代码 !DOCTYPE htmlhtml lang="en"head meta charset="UTF-8" titletitle/title style * { margin: 0; padding: 0; } div { margin-top: 20px; width: 200px; height: 100px; background-color: green; position: absolute; left: 0; top: 0;

1.匀速移动代码

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>title</title>
 <style>
  * {
   margin: 0;
   padding: 0;
  }
 
  div {
   margin-top: 20px;
   width: 200px;
   height: 100px;
   background-color: green;
   position: absolute;
   left: 0;
   top: 0;
  }
 </style>
</head>
<body>
<input type="button" value="移动到400px" id="btn1"/>
<input type="button" value="移动到800px" id="btn2"/>
<div id="dv">
 <script src="common.js"></script>
 <script>
  //点击按钮移动div
 
  my$("btn1").onclick = function () {
   animate(my$("dv"), 400);
  };
  my$("btn2").onclick = function () {
   animate(my$("dv"), 800);
  };
 
  //匀速动画
  function animate(element, target) {
   //清理定时器
   clearInterval(element.timeId);
   element.timeId = setInterval(function () {
    //获取元素的当前位置
    var current = element.offsetLeft;
    //移动的步数
    var step = 10;
    step = target > current ? step : -step;
    current += step;
    if (Math.abs(current - target) > Math.abs(step)) {
     element.style.left = current + "px";
    } else {
     clearInterval(element.timeId);
     element.style.left = target + "px";
    }
   }, 20);
  }
 </script>
</div>
</body>
</html>

2.变速移动代码

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>title</title>
 <style>
  * {
   margin: 0;
   padding: 0;
  }
 
  div {
   margin-top: 20px;
   width: 200px;
   height: 100px;
   background-color: green;
   position: absolute;
   left: 0;
   top: 0;
  }
 </style>
</head>
<body>
<input type="button" value="移动到400px" id="btn1"/>
<input type="button" value="移动到800px" id="btn2"/>
<div id="dv">
 <script src="common.js"></script>
 <script>
  //点击按钮移动div
 
  my$("btn1").onclick = function () {
   animate(my$("dv"), 400);
  };
  my$("btn2").onclick = function () {
   animate(my$("dv"), 800);
  };
 
  //变速动画
  function animate(element, target) {
   //清理定时器
   clearInterval(element.timeId);
   element.timeId = setInterval(function () {
    //获取元素的当前位置
    var current = element.offsetLeft;
    //移动的步数
    var step = (target-current)/10;
    step = step>0?Math.ceil(step):Math.floor(step);
    current += step;
    element.style.left = current + "px";
    if(current==target) {
     //清理定时器
     clearInterval(element.timeId);
    }
    
   }, 20);
  }
 </script>
</div>
</body>
</html>

common.js

/**
 * 获取指定标签对象
 * @param id 标签的id属性值
 * @returns {Element}根据id属性值返回指定标签对象
 */
function my$(id) {
  return document.getElementById(id);
}

以上所述是小编给大家介绍的JS div匀速移动动画与变速移动动画详解整合，希望对大家有所帮助！