Triangles are often used in projects. Now I will tell you about the lower triangle solid graphics written in pure CSS
.triangle{
border-width: 5px 4px 0 4px;
border-color: #454A7B transparent transparent transparent;
border-style:solid;
height: 0;
width: 0;
}Adjust the triangle graphics in other directions by yourself Style, draw inferences from one example, don't be so lazy, you will make progress by doing it yourself.
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