css3和css僞類和僞元素區別與兼容性

時間 2019-12-04

標籤 css3 css 元素區別兼容性欄目 CSS 简体版

原文原文鏈接

單冒號(:)用於CSS3僞類，雙冒號(::)用於CSS3僞元素。css 僞元素由雙冒號和僞元素名稱組成。雙冒號是在當前規範中引入的，用於區分僞類和僞元素。可是僞類兼容現存樣式，瀏覽器須要同時支持舊的僞類，好比:first-line、:first-letter、:before、:after等。css3 對於CSS2以前已有的僞元素，好比:before，單冒號和雙冒號的寫法::before做用是同樣的

>>阅读原文<<

1. CSS - 僞類和僞元素的區別
2. CSS僞類和僞元素的區別
3. CSS3僞類和僞元素的特性和區別
4. css僞元素與僞類的區別
5. css僞類與僞元素區別
6. CSS---僞類與僞元素的區別
7. css僞類和僞元素的區別，:before和::before的區別
8. css僞類和僞元素
9. CSS僞類和僞元素
10. css—僞類和僞元素
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