纯js实现的积木(div层)拖动功能示例

时间:2020-05-16 caozong 人气:0

本文实例讲述了纯js实现的积木(div层)拖动功能。分享给大家供大家参考，具体如下：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>拖动</title>
  <style type="text/css">
  </style>
</head>
<body id="content">
<input type="button" value="获取积木" id="div3"/>
</body>
<script>
  //生成积木
  document.getElementById("div3").onclick=function(){
    var num = getnumber();
    var num1 = getnumber();
    var num2 = getnumber();
    var num3 = getnumber();
    var divs = '<div id="s'+num+'"style="width: 200px;height: 200px;position: absolute;background:rgb('+num1+','+num2+','+num3+')"></div>'
    document.getElementById("content").insertAdjacentHTML("beforeEnd",divs);
    darg1("s"+num+"");
  };
  //h获取随机数，获取随机颜色
  function getnumber(){
    return parseInt(Math.random()*255);
  }
  //拖动积木
  function darg1(id){
    var obj = document.getElementById(id);
    var objx = 0;
    var objy = 0;
    obj.onmousedown = function(even){
      //鼠标到div的距离
      objx = even.clientX - obj.offsetLeft;
      objy = even.clientY - obj.offsetTop;
      /https://img.qb5200.com/download-x/div移动的距离 = 鼠标到父窗口的距离 - 鼠标到div的距离
      document.onmousemove = function(even){
        obj.style.left = even.pageX-objx+'px';
        obj.style.top = even.pageY-objy+'px';
      };
      document.onmouseup = function(){
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
    return false;
  }
</script>
<html>

点击button按钮，获取积木,获取积木后可以在浏览器内随意拖动生成的积木:

希望本文所述对大家JavaScript程序设计有所帮助。

加载全部内容