<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>文档标题</title>
<style>
.angle{
width:0px;
border:20px solid;
border-top-color:transparent;
border-bottom-color:transparent;
border-left-color:red;
border-right-color:transparent;
}
</style>
</head>
<body>
<div class="angle"></div>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>文本提示框</title>
<style>
.tip1,.tip2{
width: 20px;
height: 0;
border-width: 20px;
border-style: solid;
border-color: transparent red transparent transparent;
position:relative;
text-overflow:ellipsis;
}
.tip2{
border-color: transparent greenyellow transparent transparent;
}
.content1,.content2{
position:absolute;
top:-20px;
left:40px;
width: 200px;
height: 40px;
background:red;
text-overflow:ellipsis;
white-space: nowrap;
}
.content2{
background: greenyellow;
}
</style>
</head>
<body>
<div class="tip1">
<div class="content1">
我是文本提示框1
</div>
</div>
<br />
<div class="tip2">
<div class="content2">
我是文本提示框2
</div>
</div>
</body>
</html>