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 |