Elements deprecated in HTML5 should not be used

Web:UnsupportedTagsInHtml5Check

With the advent of HTML5, many old elements were deprecated. To ensure the best user experience, deprecated elements should not be used. This rule checks for the following deprecated elements:

Element	Remediation Action
basefont, big, blink, center, font, marquee, multicol, nobr, spacer, tt	use CSS
acronym	use abbr
applet	use embed or object
bgsound	use audio
frame, frameset, noframes	restructure the page to remove frames
isindex	use form controls
dir	use ul
hgroup	use header or div
listing	use pre and code
nextid	use GUIDS
noembed	use object instead of embed when fallback is necessary
plaintext	use the "text/plain" MIME type
strike	use del or s
xmp	use pre or code, and escape "<" and "&" characters

See

• W3C, Obsolete Features
• WHATWG, Obsolete Features