<!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>
模拟qq对话框
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