bom-对话框

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="UTF-8">

  <title>Document</title>

</head>

<body>

  <input type="button" value="alert" id="btn1">

  <input type="button" value="prompt" id="btn2">

  <input type="button" value="confirm" id="btn3">

  <script>

    var btn1 = document.getElementById('btn1');

    var btn2 = document.getElementById('btn2');

    var btn3 = document.getElementById('btn3');

    btn1.onclick = function () {

      alert('hello world');

    }

    btn2.onclick = function () {

      // 弹出提示，让用户输入内容

      var userName = prompt('请输入姓名', '张三');

      console.log(userName);

    }

    btn3.onclick = function () {

      var isSure = confirm('是否要删除数据？');

      console.log(isSure);

    }

  </script>

</body>

</html>
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bom-对话框

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