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).


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

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



<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>


p {
  font-family: cursive;

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

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



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

BCD tables only load in the browser

See also