Js 实现登录框可拖动 

<!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>
    * {
      margin: 0;
      padding: 0;
    }

    .app {
      width: 100%;
      height: 100%;
      background-color: lightblue;
      position: absolute;
      display: flex;
      justify-content: center;
      align-items: center;
    }

    #main {
      width: 300px;
      height: 200px;
      background-color: white;
      z-index: 999;
      position: absolute;
    }

    #main:hover {
      cursor: move;
    }
  </style>
</head>

<body>
  <div class="app">
    <div id="main">

    </div>
  </div>
</body>

</html>
<script>
  let login = document.querySelector('#main');
  login.addEventListener('mousedown', (e) => {
    let x = e.pageX - login.offsetLeft
    let y = e.pageY - login.offsetTop

    document.addEventListener('mousemove', move)
    function move(e) {
      login.style.left = e.pageX - x + 'px';
      login.style.top = e.pageY - y + 'px';
    }
    //鼠标抬起，销毁鼠标移动事件
    document.addEventListener('mouseup', function () {
      document.removeEventListener('mousemove', move);
    })
  });
  console.log(login);
</script>

 

posted @ 2022-07-08 20:42  含泪拒绝王阿姨i  阅读(40)  评论(0)    收藏  举报