这条规则取消了DIV元素的首个子元素P的缩进: div > p:first-child { text-indent: 0 } This selector would match the P inside the DIV of the following fragment: 这个选择器将匹配下面代码块中DIV元素内部的P元素: <P> The last P before the note. <DIV class="note"> <P> The first P insid...
:first-line, :first-letter, :nth-child, :before, :after Pseudo-classes describe element states and are logical and often dynamic. Here are some examples: XML Copy :hover, :active, :not, :first-of-type, :only-child, :empty Regardless of the specifics of pseudo-elements and pseudo-...
:before and :after Among the more debated CSS features, the:beforeand:afterpseudo-elements can be used to insert generated content before or after an element’s content. Here is an example of how:beforecan be used (from my articleCustom borders with advanced CSS): .cbb:before { content:"...
::before 和::after 伪元素常常只使用 content 属性,来添加一些短语或排版元素,但是这里我们展示了我们如果以一种更加强大的结合 counter-reset 和 counter-increment 属性的方式来使用它们。 有趣的是:::first-line 和 ::first-letter 伪元素可以匹配使用 ::before 伪元素生成的内容,如果存在的话。 ● 浏览器支...
The::beforeand::afterpseudo-elements are used toinsert contentbefore or after an element’s content, purely via CSS. These elements will inherit many of the properties of the elements that they are being attached to. Imagine you want to the words “Graphic number x:” before the descriptions...
:first-line, :first-letter, :nth-child, :before, :after Pseudo-classes describe element states and are logical and often dynamic. Here are some examples: XMLCopy :hover, :active, :not, :first-of-type, :only-child, :empty Regardless of the specifics of pseudo-el...
Formal definition Initial value 0s Applies to all elements, ::before and ::after pseudo-elements Inherited no Computed value as specified Animation type Not animatable Formal syntax animation-duration = # Examples Setting animation duration This animation has an animation-duration of 0.7 seconds...
animation-fill-mode: sets which values are applied before/after the animation.For example, you can set the last state of the animation to remain on screen, or you can set it to switch back to before when the animation began. animation-play-state: pause/play the animation. animation-composit...
The obvious issue with this approach will become apparent if you decide you would like to also style the top right and bottom left Grid Cells. You can only apply one piece of generated content to the top and one to the bottom of the container, multiple::beforeand::afterpseudo elements are...
animation-fill-mode: bothapplies the rules of bothbackwardsandforwards: The element will adopt the styles of the first keyframe before the animation begins, and the styles of the last keyframe after the animation ends. This example looks like the previous, except the car doesn’t reset at th...