纯css制作三角箭头提示框
样式：html代码<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="maopao.css">
<title>Test</title>
</head>
<body>
<div class="speech-bubble speech-bubble-top">
箭头在顶部
</div>
<br/>
<div class="speech-bubble speech-bubble-bottom">
箭头在底部
</div>
<br/>
<div class="speech-bubble speech-bubble-left">
箭头在左侧
</div>
<br/>
<div class="speech-bubble speech-bubble-right">
箭头在右侧
</div>
</body>
</html>css代码<style type="text/css">
/*
对话气泡
用法：使用.speech-bubble和.speech-bubble-DIRECTION类
<div class="speech-bubble speech-bubble-top">Hi there</div>
*/
.speech-bubble {
position: relative;
background-color: #292929;
width: 200px;
height: 150px;
line-height: 150px; /* 垂直居中 */
color: white;
text-align: center;
border-radius: 10px;
font-family: sans-serif;
}
.speech-bubble:after {
content: '';
position: absolute;
width: 0;
height: 0;
border: 15px solid;
}
/* 箭头的位置 */
.speech-bubble-top:after {
border-bottom-color: #292929;
left: 50%;
bottom: 100%;
margin-left: -15px;
}
.speech-bubble-right:after {
border-left-color: #292929;
left: 100%;
top: 50%;
margin-top: -15px;
}
.speech-bubble-bottom:after {
border-top-color: #292929;
top: 100%;
left: 50%;
margin-left: -15px;
}
.speech-bubble-left:after {
border-right-color: #292929;
top: 50%;
right: 100%;
margin-top: -15px;
}
</style>
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