Document · foundation · Concept graph
<!DOCTYPE html>
<!DOCTYPE html> is an HTML concept in Avora Learn's visual programming encyclopedia — part of building structured, accessible web pages.
Definition
<!DOCTYPE html> is an HTML concept in Avora Learn's visual programming encyclopedia — part of building structured, accessible web pages.
Visual
<!DOCTYPE html> is one tile in the HTML structure mosaic.
Animation and voice-synced diagrams live in the interactive lesson — open classroom.
Why use it
Understanding <!DOCTYPE html> helps you write clearer markup that browsers, assistive tech, and search engines can interpret correctly.
When to use it
Use <!DOCTYPE html> whenever your page structure or content needs this building block in a real HTML document.
Advantages
- Makes page meaning clearer for browsers and learners
- Connects to related HTML concepts in Avora's concept graph
Watch-outs
- Misusing <!DOCTYPE html> can confuse outlines and accessibility tools
- Does not replace CSS or JavaScript by itself
Interactive demo
Sandboxed playgrounds and voice-synced visuals run in Avora's classroom — start the lesson to try this concept hands-on.
Common errors
- Using <!DOCTYPE html> without understanding its parent concepts in the document tree.
- Treating <!DOCTYPE html> as a visual style tool instead of structural meaning (use CSS for look).
Interview
What is !DOCTYPE html?
<!DOCTYPE html> is an HTML concept in Avora Learn's visual programming encyclopedia — part of building structured, accessible web pages.
Quiz
1. !DOCTYPE html primarily belongs to which layer of the web?