First we look at the following piece of code in the page renderings:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>三角形</title>
<style>
.triangle{
width: 0;
height: 0;
border: 300px solid red;
border-top-color: red;
border-bottom-color: blue;
border-left-color: pink;
border-right-color: yellow;
}
</style>
</head>
<body>
<div class="triangle"></div>
</body>
</html>
See the renderings, we will probably know how to write a triangle, we can set the border-bottom half none at this box, there is no
border-top: none;
The effect is as follows:
Then we will border-left and border-right color to be transparent, so that only the border-bottom
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>三角形</title>
<style>
.triangle{
width: 0;
height: 0;
border: 100px solid transparent;
border-top-color: black;
border-bottom: none;
border-left-color: transparent;
border-right-color: transparent;
}
</style>
</head>
<body>
<div class="triangle"></div>
</body>
</html>
The effect is as follows:
Well, we now complete the preparation of the triangle, there are other similar triangles, replicability, can do it this way, here I will not describe. Finally, I wish you all happy to learn.