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js拖拽元素

2022-07-23 09:41:00 【ohmorning】 

<!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>
      .a {
    
        width: 200px;
        height: 200px;
        background: #ccc;
        position: absolute;
      }
    </style>
  </head>
  <body>
    <div class="a"></div>
    <script>
      let a = document.querySelector('.a')
      let isMove = false
      let x = 0
      let y = 0
      a.onmousedown = function (e) {
    
        x = e.pageX - a.offsetLeft
        y = e.pageY - a.offsetTop
        isMove = true
      }
      a.onmouseup = function () {
    
        isMove = false
      }
      a.onmousemove = function (e) {
    
        if (isMove) {
    
          a.style.left = e.pageX-x + 'px'
          a.style.top = e.pageY-y + 'px'
        }
      }
    </script>
  </body>
</html>

注解：
e.pageX 鼠标X轴位置
a.offsetLeft 元素边框距离父元素内边距的距离
e.pageX - a.offsetLeft记录鼠标点击时，在元素内的位置

原网站

版权声明
本文为[ohmorning]所创，转载请带上原文链接，感谢
https://blog.csdn.net/qq_41818857/article/details/125906783

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