study_javascript/popUp.html at master · cqupthjb/study_javascript · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>弹出框</title>
</head>

<body>
    <h1>确认框</h1>
    <button onclick="myFunction(flag = 1)">点击试一试确认框</button>
    <h1>提示框</h1>
    <button onclick="myFunction(flag = 0)">点击试一试提示框</button>
    <p id="demo"></p>
    <script>
        function myFunction(flag) {
            var txt;
            if (flag == 1) {
                var flag = confirm("发起投票：是否赞成（确认/取消）")
                if (flag) {
                    txt = '你选择了赞成';
                } else {
                    txt = '你选择了取消';
                }
                document.getElementById('demo').innerHTML = txt;
            }else {
                //当用户取消输入，则返回NULL
                var name = prompt('请输入你的名字：', '黄建波');
                if(name == null || name == ""){
                    txt = "用户输入取消";
                }else {
                    txt = '嗨！' + name + '，今天开心吗？';
                }
                document.getElementById('demo').innerHTML = txt;
            }
        }
    </script>
</body>

</html>