模拟qq对话框

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .test-div {
            position: relative;
            width: 150px;
            height: 36px;
            border-radius: 5px;
            border:1px solid #000;
            background: rgba(245,245,245,1);
        }
        .test-div:before,.test-div:after {
            content: "";
            display: block;
            position: absolute;
            top: 8px;
            width: 0;
            height: 0;
            border:6px solid transparent;
        }
        .test-div:before {
            left:-11px;
            border-right-color: rgba(245,245,245,1);
            z-index: 1;
        }
        .test-div:after {
            left: -12px;
            border-right-color: rgba(0,0,0,1);
            z-index: 0;
        }
    </style>
</head>
<body>
<div class="test-div"></div>
</body>
</html>

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转载自blog.csdn.net/qq_35425276/article/details/80624942
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