可以使用Visual studio Code来编写代码。安装Prettier插件格式化代码、安装Live Server插件快速预览代码效果。
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编写HTML代码时，可以使用Emmet语法，提高编写效率。
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CSS伪类选择器（Pseudo-class Selectors）。
article :first-child #The first child of article elements
article :first-of-type #The first occurrence of elements of different type
article p:first-of-type # The first p element inside article elements
- CSS伪元素选择器（Pseudo-element Selectors）
p::first-letter #The first letter of every p element
p::first-line #The first line of every p element
::selection #Any selected element
p::before #To insert content before the content of p elements
p::after #To insert content after the content of p elements
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