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
Mediaas each of the properties of the shorthand:
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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support29 ? No10 -ms-

16

11.1 — 15

No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4.429 ? No

16

11.1 — 14

No Yes

 

Document Tags and Contributors

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