lovecoding
/
W0407


			
				
					
						
						
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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">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            list-style: none;
            text-decoration: none;
            box-sizing: border-box;
        }
        #container {
            width: 100vw;
            position: relative;
        }
        #under {
            width: 90%;
            height: 520px;
            color: #fff;
            font-size: 28px;
            text-align: center;
            line-height: 520px;
            background: #ccc;
            margin: 0 auto;
        }
        #dialog {
            width: 80%;
            height: 300px;
            background: #fff;
            position: absolute;
            top: 20%;
            left: 40px;
            z-index: 99;
        }
        #title {
            font-size: 20px;
            width: 100%;
            height: 200px;
            text-align: center;
            line-height: 200px;
        }
        #btn {
            width: 100%;
            height: 100px;
        }
        #close {
            width: 100px;
            height: 40px;
            text-align: center;
            line-height: 40px;
            color: #fff;
            background: #00f;
            margin: 0 auto;
        }
        #mask {
            width: 100%;
            height: 100vh;
            position: absolute;
            top: 0;
            left: 0;
            background:rgba(0,0,0,.3)
        }
    </style>
</head>
<body>
    <div id="container">
        <div id="under">底层元素</div>
        <div id="dialog">
            <div id="title">弹出层</div>
            <div id="btn">
                <div id="close">关闭</div>
            </div>
        </div>
        <div id="mask"></div>
    </div>
    <script>

        /**
         * 点透事件
         * 1.两层元素叠加到一起
         * 2.第一层是touch事件
         * 3.第二层是click事件或者a标签
         * 
         * 
         * 解决方案：
         * 1.event.preventDefault()
         * 2.将click事件全部换成touch
         * */
        let close = document.getElementById("close");
        let under = document.getElementById("under");
        close.ontouchstart = function(event) {
            event.preventDefault();
            document.getElementById("dialog").style.display = 'none';
            document.getElementById("mask").style.display = 'none';
        }
        under.onclick = function() {
            alert("弹出")
        }
    </script>
</body>
</html>