p::before {content:'';width:100px;height:100px;background-color:red;}text✅The text paragraph + a box of 100x100 and red will be displayed 即使我们不想添加任何文本,我们仍然需要用 '' 填充该属性。这是使用伪元素时最常见的错误之...
原文| https://betterprogramming.pub/mastering-css-before-and-after-ecf1d59d9a3d 翻译| 小爱 CSS 伪元素用于为元素的指定部分设置样式。回顾一下,让我们检查一下 Mozilla 开发者网络上的参考解释: “CSS 伪元素是添加到选择器的关键字,可让您设置所选元素的特定部分的样式。例如,::first-line 可用于更改段...
简单区分:before与::before的区别 :hover我们都知道,称作伪类,英文名pseudo-class,而我们此处提到的:before以及:after也是伪类,属于css2的内容,在ie8下也能正常的支持 至于::before,引用MDN的解释 ::before creates a pseudo-element that is the first child of the element matched. It is often used to add...
elements generated by ::before and ::after are boxes generated as if they were immediate children of the element on which they are applied, or the "originating element," and thus can not apply to replaced elements, such as , whose content is outside the scope of the CSS formatting model...
In CSS,::beforecreates apseudo-elementthat is the first child of the selected element. It is often used to add cosmetic content to an element with thecontentproperty. It is inline by default. Try it Note:The pseudo-elements generated by::beforeand::afterare boxes generated as if they were...
had a same problem few minutes ago and justcontent:none;did not do work but addingcontent:none !important;anddisplay:none !important;worked for me T Tha'er M. Al-Ajlouni p:after { content: none; } This is a way to remove the:afterand you can do the same for:before ...
和第二种方式一样，也是利用空元素替代接受浮动的影响，只不过是利用伪类:after 生成空元素，clearfix:...
Full support Full support No support No support Deprecated. Not for use in new websites. See implementation notes. See also break-before, break-after, break-inside page-break-after, page-break-inside orphans, widowsHelp improve MDN Was this page helpful to you? YesNoLearn how to contribute....
和第二种方式一样，也是利用空元素替代接受浮动的影响，只不过是利用伪类:after 生成空元素，clearfix:...
always auto avoid left right Legend Tip: you can click/tap on a cell for more information. Full support Full support No support No support See implementation notes. See also break-before,break-after,break-inside page-break-after,page-break-inside ...