详解CSS3 用border写空心三角箭头 (两种写法)

小诸哥 2022-06-17 21:43:06 0

之前一直在寻找这种空心三角箭头, 终于知道了原理! 自己记录一下,顺便分享给之前跟我一样想要的撸友们~

第一种写法利用常见的 after伪元素

<!DOCTYPE html>
<html>
     <head>
         <meta charset="UTF-8">
         <title></title>
         <style type="text/CSS">
             .arrow {
                 width: 20px;
                 height: 4px;
                 margin: 0 auto 7px;
                 border-left: 4px solid transparent;
                 border-right: 4px solid transparent;
                 border-bottom: 4px solid #343c99;
                 transform: rotate(45deg);
                 transform-origin: left;
             }
            
             .arrow:after {
                 content: '';
                 display: block;
                 width: 100%;
                 height: 100%;
                 border-left: 4px solid transparent;
                 border-right: 4px solid transparent;
                 border-top: 4px solid #343c99;
                 position: absolute;
                 right: -10px;
                 top: -14px;
                 transform: rotate(90deg);
                 transform-origin: bottom;
             }
         </style>
     </head>
     <body>
         <div class="arrow"></div>
     </body>
</html>

第二种写法相对于比较简单

<!DOCTYPE html>
<html>
     <head>
         <meta charset="UTF-8">
         <title></title>
         <style type="text/css">
             /*简单*/
             .wb_arrow{
                 border-right: 2px solid #343c99;
                 border-top: 2px solid #343c99;
                 height: 10px;
                 width: 10px;
                 margin:50px auto 0;
                 transform: rotate(deg);
                 -webkit-transform: rotate(0deg);
                 /*不加这两个属性三角会比上一个略丑, 大家可以试一下*/
                 border-left: 2px solid transparent;
                 border-bottom: 2px solid transparent;
             }
         </style>
     </head>
     <body>
         <div class="wb_arrow"></div>
     </body>
</html>