宽度 | @viewport.width
widthCSS描述符是用于设定两个最小宽度和视口的最大宽度的简写。通过提供一个视口长度值，该值将确定所提供的值的最小宽度和最大宽度。
如果提供两个视口值，则第一个值将设置为最小宽度，第二个值将设置为最大宽度。
Related at-rule | @viewport |
|---|---|
初始值 | as each of the properties of the shorthand: min-width: 0 max-width: none |
百分比值 | as 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 | visual, continuous |
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 |
min-width：0
max-width：none
Percentages as each of the properties of the shorthand:min-width：参考包含块的宽度
max-width：参考包含块的宽度
Media visual, continuous [Computed value](../computed_value) as each of the properties of the shorthand:min-width：指定的百分比或绝对长度
max-width：指定的百分比或绝对长度或none
Canonical order order of appearance in the formal grammar of the values 语法
/* An example with one viewport value: */
@viewport {
width: 320px;
}
/* An example with two viewport values: */
@viewport {
width: 320px, 120px;
}值
auto使用的值是从其他CSS描述符的值中计算出来的。
<length>非负的绝对或相对长度。
<percentage>相对于初始视口宽度或高度的缩放因子1.0的百分比值，分别为水平和垂直长度。必须是非负的。
正式语法
auto | <length> | <percentage>规范
Specification | Status | Comment |
|---|---|---|
CSS Device AdaptationThe definition of '"min-width" descriptor' in that specification. | Working Draft | Initial definition |
浏览器兼容性
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
Basic support | 29 (behind a flag) | No support | 10 -ms | 11.10 Removed in 15 Reintroduced behind a flag in 16 | No support |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | ||
|---|---|---|---|---|---|---|---|---|
Basic support | 4.4 | 4.4 | 29 | 29 | No support | 10-ms | 11.10 Removed in 15 Reintroduced behind a flag in 16 | No support |
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