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HTML Doctype

Overview

  • Doctype mention is not necessary to write an HTML Page.
  • Doctype provides information regarding the version of HTML to be followed by the browser for a specific HTML page (to render it correctly).

Use of Doctype

However, it is not compulsory to add a doctype to your web page but while making professional websites it helps in rendering the web pages correctly (by the browser), depending on the doctype declaration you made for that particular HTML page.

<!doctype html>

Doctype declaration helps the browser (eg: chrome or firefox) to understand what version of html are you using for your web pages, and what protocols are to be followed to render these web pages correctly.

Doctype Versions

The following table shows various doctype versions and their implementation codes:

VersionYear
HTML 4.01<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
XHTML<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
HTML5<!DOCTYPE html>
Further Reading

1. Doctype

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