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Summary

The width CSS descriptor is shorthand for setting both the min-width and the max-width of the viewport. By providing one viewport length value, that value will determine both the min-width and the max-width to the value provided.

If two viewport values are provided the first value will be set to the min-width and the second value will be set max-width.

Related at-rule@viewport
Initial valueas each of the properties of the shorthand:
Percentagesas each of the properties of the shorthand:
  • min-width: refer to the width of the containing block
  • max-width: refer to the width of the containing block
Mediavisual, continuous
Computed valueas each of the properties of the shorthand:
  • min-width: the percentage as specified or the absolute length
  • max-width: the percentage as specified or the absolute length or none
Canonical orderorder of appearance in the formal grammar of the values

Syntax

/* An example with one viewport value: */
@viewport {
    width: 320px;
}

/* An example with two viewport values: */
@viewport {
    width: 320px, 120px;
}

 

Values

auto
The used value is calculated from the other CSS descriptors' values.
<length>
A non-negative absolute or relative length.
<percentage>
A percentage value relative to the width or height of the initial viewport at zoom factor 1.0, for horizontal and vertical lengths respectively. Must be non-negative.

Formal syntax

auto | <length> | <percentage>

Specifications

Specification Status Comment
CSS Device Adaptation
The definition of '"min-width" descriptor' in that specification.
Working Draft Initial definition

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 29 (behind a flag) Not supported 10 -ms 11.10
Removed in 15
Reintroduced behind a flag in 16
Not supported
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support
4.4
29
Not supported 10-ms 11.10
Removed in 15
Reintroduced behind a flag in 16
Not supported

 

Document Tags and Contributors

 Contributors to this page: unscsprt, mrenty, tuttza
 Last updated by: unscsprt,