<!DOCTYPE html>
HTML5 doctype won’t break your existing markup, because all the tags defined in HTML 4 are still supported in HTML5.
<!DOCTYPE html>
HTML
, XHTML
, and the HTML DOM
. HTML5 is still a work in progress. However, most modern browsers have some HTML5 support.<canvas>
element for making graphics with Javascript.<audio>
and <video>
element for media streaming and playback.localStorage
and sessionStorage
using the Web Storage interface.email
, url
, number
, range
and date
.<datalist>
, <keygen>
and <output>
.