In CSS we can use both ID and class. is there any pros and cons if i use Class always instead ID in terms of Semantic, Web standards- W3C , SEO , Accessibility and future maintainability?In CSS we can use both ID and class. is there a
阅读背景：
如果我总是使用CSS类而不是CSS ID，那么有什么优点和缺点吗？
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