Introduction to the role of HTML doctype
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Document mode has the following two functions: 1. Tell the browser what HTML or XHTML specification to use to parse HTML documents 2. Affects the browser's rendering mode; different rendering modes will affect the browser's parsing of CSS code and even JavaScript scripts, so Doctype is very critical, especially in the IE series browsers, the rendering mode of the HTML page determined by DOCTYPE is crucial. Two rendering modes: BackCompat: Standard compatibility mode is not enabled (also called Quirks mode or promiscuous mode) CSS1Compat: Standards compatibility mode is enabled (also called strict mode [Standards mode/Strict mode]) |
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