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.

* Some parts of this feature may have varying levels of support.

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

min-width: 150px;

min-width: 20em;

min-width: 75%;

min-width: 40ch;

<section class="default-example" id="default-example">
  <div class="transition-all" id="example-element">
    Change the minimum width.
  </div>
</section>

#example-element {
  display: flex;
  flex-direction: column;
  background-color: #5b6dcd;
  height: 80%;
  justify-content: center;
  color: #ffffff;
}

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 length, 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> = 
  <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

参见