代码语言：javascript复制
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
/*@mixin triangle($dir,$width,$color)
{
width: 0;
height: 0;
border-width: $width;
border-style: solid solid solid solid;
@if($dir==Up)
{
border-color: transparent transparent transparent transparent;
}
@else if($dir==Down)
{
border-color: $color transparent transparent transparent;
}
@else if($dir==Left)
{
border-color: transparent $color transparent transparent
}
@else if($dir==Right)
{
border-color: transparent transparent transparent $color;
}
}
div
{
@include triangle(Left,50px,blue);
}*/
div {
width: 0;
height: 0;
border-width: 50px;
border-style: solid solid solid solid;
border-color: transparent blue transparent transparent;
}
</style>
</head>
<body>
<div></div>
</body>
</html>
