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                ## :after 選擇器 ### 定義和用法 :after選擇器向選定的元素之后插入內容。 :after是偽元素,并且它生成包含放置在元素中的內容之后的生成內容的偽元素。 使用[content](https://www.w3cschool.cn/cssref/pr-gen-content.html) 屬性來指定要插入的內容。 默認情況下,此偽元素是內聯的,但是可以使用屬性顯示更改。 **例子:** ~~~ a.external:after {content: " " url(image.gif);) p:after {content: " | ";} ~~~ ## 實例1--每個元素之后插入內容: ``` <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>W3Cschool教程(w3cschool.cn)</title> <style> p:after { content:"- 注意我"; } </style> </head> <body> <p>我的名字是 Donald</p> <p>我住在 Ducksburg</p> <p><b>注意:</b> :after在IE8中運行,必須聲明!DOCTYPE </p> </body> </html> ``` ## 實例2--在每個 之后插入的內容和樣式: ``` <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>W3Cschool教程(w3cschool.cn)</title> <style> p:after { content:"- Remember this"; background-color:yellow; color:red; font-weight:bold; } </style> </head> <body> <p>My name is Donald</p> <p>I live in Ducksburg</p> <p><b>注意:</b>:after作用于IE8 以及更早版本的瀏覽器,DOCTYPE 必須已經聲明.</p> </body> </html> ```
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