The scan CSS media feature can be used to test the scanning process (if any) utilized by the output device. The word scanning used in this context does not refer to an image scanner, such as one used to digitize a photograph. Rather, it means the process by which an image is painted onto a television screen (or other device).

Syntax

The scan feature is specified as a single keyword value chosen from the list below.

interlace
The device draws odd lines and even lines alternately. Some televisions use interlaced scanning.
progressive
The device draws all lines in sequence. All computer screens use progressive scanning.

Example

HTML

<p>If your screen uses interlaced rendering, this text should
   be in a sans-serif font. If your screen uses progressive
   scanning, you should see a serif font.</p>

CSS

p {
  font-family: cursive;
}

@media (scan: interlace) {
  p {
    font-family: sans-serif;
  }
}

@media (scan: progressive) {
  p {
    font-family: serif;
  }
}

Result

Specifications

Specification Status Comment
Media Queries Level 4
The definition of 'scan' in that specification.
Candidate Recommendation No change.
Media Queries
The definition of 'scan' in that specification.
Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome No support NoEdge ? Firefox No support NoIE No support NoOpera No support NoSafari No support NoWebView Android ? Chrome Android ? Edge Mobile ? Firefox Android No support NoOpera Android ? Safari iOS ? Samsung Internet Android ?

Legend

No support  
No support
Compatibility unknown  
Compatibility unknown

Document Tags and Contributors

Contributors to this page: connorshea, mfluehr, kscarfone, jsx, cvrebert
Last updated by: connorshea,