First, HTML <!doctype> tags

Source: Internet
Author: User

OneHTML <!doctype>labelDefinition and usage

<! The doctype> declaration must be the first line in the HTML document, before the tag.

<! The doctype> declaration is not an HTML tag; it indicates which HTML The Web browser uses for the page Version to write the instructions.

In HTML 4.01 ,<! The doctype> declaration references a DTDbecause the HTML 4.01 is based on SGML. the DTD prescribes the rules of the markup language so that the browser renders the content correctly.

HTML5 is not based on SGML, so you do not need to reference a DTD.

HTML5the general wording (DOCTYPEstatement):

<! DOCTYPE html>

<title> title of the page </title>

<body>

The body part of the page

</body>

First, HTML <!doctype> tags

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