边框在Web页面的内容块中非常常用,这里为大家整理了CSS制作边框效果的技巧总结,尤其是第三种方案的background-origin利用十分讨巧,需要的朋友可以参考下
比如这里最终需求如下:
html代码:
<ul class="demo"> <li>Lady gaga</li> <li>Mariah Carey</li> <li>Adele</li> <li>Avril Lavigne</li> <li>Sarah Brightman</li> <li>Celine Dion</li> </ul>
方案一:
使用伪元素制作一个变宽,并定位在底部。
CSS代码:
.demo li { padding-left: 15px; line-height: 40px; } .demo li::after { position: absolute; rightright: 0; bottombottom: 0; left: 0; border-bottom: 1px solid #ccc; content: "\0020"; } .demo li:not(:last-child)::after { left: 15px; } .demo li:hover { background-color: #f3f3f3; }
方案二:
so cool,使用背景图像(注意是图像)渐变,代码瞬间少了许多。(原文用background,我这里改回background-image方便理解)
.demo li { padding-left: 15px; line-height: 40px; background-image: linear-gradient(transparent 39px, #ccc 39px, #ccc) no-repeat; } .demo li:not(:last-child) { background-position: 15px; } .demo li:hover { background-color: #f3f3f3; }
方案三:
在第三种的基础上使用了background-origin
background-origin: border-box | padding-box | content-box
padding-box:从padding区域(含padding)开始显示背景图像。
border-box:从border区域(含border)开始显示背景图像。
content-box:从content区域开始显示背景图像。
所以我们可以利用padding-box和content-box解析不同的背景图像(注意是图像)开始区域。来实现,代码如下:
.demo li { padding-left: 15px; line-height: 40px; background-image: linear-gradient(transparent 39px, #ccc 39px, #ccc) no-repeat; background-origin:padding-box;/*background-origin默认值,可不写,我只是为了跟下面对比而已*/ } .demo li:not(:last-child) { background-origin:content-box; } .demo li:hover { background-color: #f3f3f3; }
以上就是本文的全部内容,希望对大家的学习有所帮助,更多相关内容请关注PHP中文网!
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