scan - CSS: Cascading Style Sheets 编辑

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.

Examples

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

Browser compatibility

BCD tables only load in the browser

See also

• Using Media Queries
• @media