min-width

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

min-width CSS 属性为给定元素设置最小宽度。它可以阻止 width 属性的应用值小于 min-width 指定的值。

尝试一下

当 min-width 大于 max-width 或 width 时，元素的宽度将被设置为 min-width 的值。

语法

css
/* <length> 值 */
min-width: 3.5em;

/* <percentage> 值 */
min-width: 10%;

/* 关键字值 */
min-width: max-content;
min-width: min-content;
min-width: fit-content;
min-width: fit-content(20em);

/* 全局值 */
min-width: inherit;
min-width: initial;
min-width: revert;
min-width: revert-layer;
min-width: unset;

值

<length>

以绝对值定义 min-width。

<percentage>

以包含区块的宽度百分比定义 min-width。

auto

浏览器将计算并选择指定元素的 min-width。

max-content

固有首选 min-width。

min-content

固有最小 min-width。

fit-content

使用可用空间，但不得超过 max-content，即 min(max-content,max(min-content,stretch))。

fit-content(<length-percentage>)

使用 fit-content 公式，用指定参数替换可用空间，即 min(max-content, max(min-content, argument))。

形式定义

初始值auto
适用元素all elements but non-replaced inline elements, table rows, and row groups
是否是继承属性否
Percentagesrefer to the width of the containing block
计算值the percentage as specified or the absolute length
动画类型a CSS data type are interpolated as real, floating-point numbers.">length, CSS data type are interpolated as real, floating-point numbers.">percentage or calc();

形式语法

min-width = 
  auto                                      |
  <length-percentage [0,∞]>                 |
  min-content                               |
  max-content                               |
  fit-content( <length-percentage [0,∞]> )  |
  <calc-size()>                             |
  <anchor-size()>                           

<length-percentage> = 
  <length>      |
  <percentage>  

<calc-size()> = 
  calc-size( <calc-size-basis> , <calc-sum> )  

<anchor-size()> = 
  anchor-size( [ <anchor-name> || <anchor-size> ]? , <length-percentage>? )  

<calc-size-basis> = 
  <intrinsic-size-keyword>  |
  <calc-size()>             |
  any                       |
  <calc-sum>                

<calc-sum> = 
  <calc-product> [ [ '+' | '-' ] <calc-product> ]*  

<anchor-name> = 
  <dashed-ident>  

<anchor-size> = 
  width        |
  height       |
  block        |
  inline       |
  self-block   |
  self-inline  

<calc-product> = 
  <calc-value> [ [ '*' | '/' ] <calc-value> ]*  

<calc-value> = 
  <number>        |
  <dimension>     |
  <percentage>    |
  <calc-keyword>  |
  ( <calc-sum> )  

<calc-keyword> = 
  e          |
  pi         |
  infinity   |
  -infinity  |
  NaN

示例

设置元素最小宽度

css
table {
  min-width: 75%;
}

form {
  min-width: 0;
}

规范

Specification
CSS Box Sizing Module Level 3
# min-size-properties
CSS Box Sizing Module Level 4
# sizing-values

浏览器兼容性

BCD tables only load in the browser

参见