HTML doctype declaration - W3Schools
All HTML documents must start with a <!DOCTYPE> declaration. The declaration is not an HTML tag. It is an "information" to the browser about what document type to expect. In HTML 5, the declaration is …
HTML DOCTYPE Declaration - GeeksforGeeks
Nov 1, 2025 · HTML DOCTYPE (Document Type Declaration) is an instruction that appears at the beginning of an HTML document, before the <html> tag. Its primary role is to tell the web browser …
Document type declaration - Wikipedia
In XML, the root element that represents the document is the first element in the document. For example, in XHTML, the root element is <html>, being the first element opened (after the doctype …
Doctype - Glossary | MDN
Jul 11, 2025 · The doctype is case-insensitive. The convention of MDN code examples is to use lowercase, but it's also common to write it as <!DOCTYPE html>.
HTML Doctype: Syntax, Usage, and Examples
Master the HTML doctype declaration! Learn why <!DOCTYPE html> matters, how it works, and how to avoid quirks mode and rendering issues.
Syntax of HTML5 Doctype Declaration - Tutorial Republic
A Document Type Declaration, or DOCTYPE for short, is an instruction to the web browser about the version of markup language in which a web page is written. A DOCTYPE declaration appears at the …
HTML Document Type Declaration - W3Schools
Every HTML document requires a document type declaration. It is a directive that tells the web browser about the HTML version and standard in which the current page is written; this helps different web …
HTML - <!DOCTYPE> Declaration - Online Tutorials Library
The HTML <!DOCTYPE> declaration, is a component of the HTML document used to inform the web browser about the HTML version and document type it should use for rendering the page.
What is the DOCTYPE Declaration in HTML? An Essential Guide for …
Jan 11, 2025 · The DOCTYPE must be the very first line of code in your HTML, before the <html> tag. It is considered best practice to always add the declaration in your pages for stability.
What is the meaning of DOCTYPE in HTML - GeeksforGeeks
Jul 23, 2025 · The HTML document type declaration or Doctype is an instruction used by web browsers to fetch what version of HTML the website is written in. It helps browsers in understanding how the …