HTML Checking for Large Sites

Rocket Validator automatically checks your pages on the W3C Validator.

Bad value “screen,projection” for attribute “media” on element “link”: The media “projection” has been deprecated

The projection media type was deprecated in Media Queries 4.

Media types describe the general category of a device, for example screen, print and speech.

CSS 2.1 and Media Queries 3 defined several additional media types (tty, tv, projection, handheld, braille, embossed, and aural), but they were deprecated in Media Queries 4 and shouldn’t be used.

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