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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
初始值as 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
适用媒体as each of the properties of the shorthand:
计算值as 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
正规顺序order 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
"min-width" descriptor
Working Draft Initial definition

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 29 (behind a flag) 未实现 10 -ms 11.10
Removed in 15
Reintroduced behind a flag in 16
未实现
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support
4.4
29
未实现 10-ms 11.10
Removed in 15
Reintroduced behind a flag in 16
未实现

 

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