CSS3画五角星

CSS3画五角星

html:

<div class="star"></div>

css:

    <style>
        body{
            margin: 0;
        }
        /* 注意：
        红色三角形的顶点，是这个图像的左上角的点（也是其他图形，进行定位的参考点）
         */
        .star{
            width: 0;
            height: 0;
            border-left: 100px solid transparent;
            border-bottom: 70px solid red;
            border-right: 100px solid transparent;
            position: relative;
            margin: 200px;
            outline: 1px dashed green;
            transform: rotate(36deg);
        }
        /*  */
        .star::before{
            content: '';
            display: block;
            width: 0;
            height: 0;
            border-left: 100px solid transparent;
            border-bottom: 70px solid blue;
            border-right: 100px solid transparent;
            position: relative;
            left: -103px;
            top: 2px;
            outline: 1px dashed green;
            transform: rotate(290deg);
        }
        .star::after{
            content: '';
            display: block;
            width: 0;
            height: 0;
            border-left: 100px solid transparent;
            border-bottom: 70px solid yellow;
            border-right: 100px solid transparent;
            position: relative;
            left: -98px;
            top: -67px;
            outline: 1px dashed green;
            transform: rotate(74deg);
        }
    </style>

预览：