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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No ? No No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? ? ? No ? ? ?

Document Tags and Contributors

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