lovecoding
/
VIP30


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    #div1{
      width: 200px;
      height: 200px;
      background: red;
      position: absolute;
    }
  </style>
</head>
<body>
  <div id="div1"></div>
  <script>
    var div1 = document.getElementById('div1')

    //鼠标按下事件
    div1.onmousedown = function(e){
      // console.log(e.clientX,e.clientY)

      //鼠标距离div1边框的距离
      var xLeft = e.clientX - div1.offsetLeft
      var xTop = e.clientY - div1.offsetTop
      console.log(xLeft,xTop)

      div1.onmousemove = function(e){
        div1.style.left = e.clientX - xLeft +'px'
        div1.style.top = e.clientY - xTop + 'px'
        // console.log(111)
      }
    }

    div1.onmouseup = function(){
      div1.onmousemove = null
    }
  </script>
</body>
</html>