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front-end-interview.md
Doctype 作用?严格模式与混杂模式如何区分?它们有何意义? DTD(文档类型定义)是一组机器可读的规则,它们指示 (X)HTML 文档中允许有什么,不允许有什么。<!DOCTYPE>声明位于位于 HTML 文档中的第一行,处于 标签之前,告知浏览器的解析器用什么文档标准 ...
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