前端杂记

1.去掉超链接的下划线：text-decoration: none;

        a{
            font-size: 20px;
            text-decoration: none;

        }

 2.让鼠标显示小手的样式：cursor: pointer;

        span{
            color: red;
            /*让鼠标显示小手的样式*/
            cursor: pointer;
        }

 3.增加下划线：text-decoration: underline;

        .line{
            text-decoration: underline;
        }

 4.让一个盒子居中显示：margin: 0 auto;

        .w{
            margin: 0 auto;
            border: 1px solid red;
            width:400px;
        }