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css的僞元素::after和::before
時間 2020-12-25
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CSS學習
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CSS
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// 轉載自：淺談css的僞元素::after和::before css中的::after和::before已經被大量地使用在我們日常開發中了，使用他們可以使我們的文檔結構更加簡潔。 但是很多人對::after和::before仍不是特別瞭解，究竟他們是做什麼的？如何使用他們？什麼時候應該使用他們？筆者總結了一些對僞元素的理解和使用經驗。 一、概念： 1.定義 從定義我們知道::before和::
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