Doctypes
Doctypes
Introduction
All HTML documents must start with a<!DOCTYPE>
declaration above the<html>
tag.
This tells the browser how to render the HTML, as in this example:
<!DOCTYPE html>
This is the HTML5 doctype but W3C provides information on
When it goes wrong
If no valid
<!DOCTYPE>
is declared, the browser switches to
In this case, elements from the HTML5 specification may not parse or render properly. This can cause issues for people who use assistive technologies.