The one thing to know about HTML5

By Mattias Kihlström 4 April 2012

<!DOCTYPE html>

What does it mean?

This is the agreed upon document type declaration of HTML version 5.

Where should it go?

At the very beginning of every HTML5 document.

What makes it special?

<!DOCTYPE html> is the minimum document type declaration that triggers standards-compliant rendering mode (as opposed to quirks mode) in supported browsers.

The one thing to know about HTML5

What does it mean?

Where should it go?

What makes it special?

Further reading