利用 js 实现弹出蒙板(model)功能

思路:

创建一个蒙板, 设置蒙板的堆叠顺序保证能将其它元素盖住


position: absolute;
top: 0;
left: 0;
display: none;
background-color: rgba(9, 9, 9, 0.63);
width: 100%;
height: 100%;
z-index: 1000;

设置蒙板中内容的背景色和展示格式


width: 50%;
text-align: center;
background: #ffffff;
border-radius: 6px;
margin: 100px auto;
line-height: 30px;
z-index: 10001;

绑定事件, 动态切换蒙板的 display 属性


function showModel() {
    document.getElementById('myModel').style.display = 'block';
}
function closeModel() {
    document.getElementById('myModel').style.display = 'none';
}

注意事项: 蒙板要采用绝对定位, 宽和高要占満整个页面, 堆叠顺序要大

源代码


<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <title>蒙板</title>
    <style>
        .container {
            width: 900px;
            margin: 50px auto;
            text-align: center;
        }

        #myModel {
            position: absolute;
            top: 0;
            left: 0;
            display: none;
            background-color: rgba(9, 9, 9, 0.63);
            width: 100%;
            height: 100%;
            z-index: 1000;
        }

        .model-content {
            width: 50%;
            text-align: center;
            background: #ffffff;
            border-radius: 6px;
            margin: 100px auto;
            line-height: 30px;
            z-index: 10001;
        }
    </style>
</head>
<body>
<div class="container">
    <button onclick="showModel()">弹出蒙板</button>
    <div >
        <div class="model-content">
            <p>你好啊,我是内容~~</p>
            <p>
                <button >关闭</button>
            </p>
        </div>
    </div>
</div>
<script>
    function showModel() {
        document.getElementById('myModel').style.display = 'block';
    }
    function closeModel() {
        document.getElementById('myModel').style.display = 'none';
    }
</script>
</body>
</html>