1. Flexbox 和 Grid
  2. flex

Flexbox 和 Grid

flex

用于控制弹性项如何增大和缩小的工具。

样式
flex-<number>
flex: <number>;
flex-<fraction>
flex: calc(<fraction> * 100%);
flex-auto
flex: 1 1 auto;
flex-initial
flex: 0 1 auto;
flex-none
flex: none;
flex-(<custom-property>)
flex: var(<custom-property>);
flex-[<value>]
flex: <value>;

示例(Examples)

¥Examples

基本示例(Basic example)

¥Basic example

使用 flex-<number> 工具(如 flex-1)允许弹性项目根据需要增大和缩小,忽略其初始大小:

¥Use flex-<number> utilities like flex-1 to allow a flex item to grow and shrink as needed, ignoring its initial size:

01
02
03
<div class="flex">
<div class="w-14 flex-none ...">01</div>
<div class="w-64 flex-1 ...">02</div>
<div class="w-32 flex-1 ...">03</div>
</div>

最初(Initial)

¥Initial

使用 flex-initial 允许弹性项目收缩但不增长,考虑到它的初始大小:

¥Use flex-initial to allow a flex item to shrink but not grow, taking into account its initial size:

01
02
03
<div class="flex">
<div class="w-14 flex-none ...">01</div>
<div class="w-64 flex-initial ...">02</div>
<div class="w-32 flex-initial ...">03</div>
</div>

自动(Auto)

¥Auto

使用 flex-auto 允许弹性项目增长和收缩,同时考虑到它的初始大小:

¥Use flex-auto to allow a flex item to grow and shrink, taking into account its initial size:

01
02
03
<div class="flex ...">
<div class="w-14 flex-none ...">01</div>
<div class="w-64 flex-auto ...">02</div>
<div class="w-32 flex-auto ...">03</div>
</div>

无(None)

¥None

使用 flex-none 防止弹性项目增长或收缩:

¥Use flex-none to prevent a flex item from growing or shrinking:

01
02
03
<div class="flex ...">
<div class="w-14 flex-none ...">01</div>
<div class="w-32 flex-none ...">02</div>
<div class="flex-1 ...">03</div>
</div>

使用自定义值(Using a custom value)

¥Using a custom value

使用 flex-[<value>] 语法 根据完全自定义的值设置 flex shorthand property

<div class="flex-[3_1_auto] ...">
<!-- ... -->
</div>

对于 CSS 变量,还可以使用 flex-(<custom-property>) 语法:

<div class="flex-(--my-flex) ...">
<!-- ... -->
</div>

这只是简写,用于 flex-[var(<custom-property>)] 它会自动为你添加 var() 函数。

响应式设计(Responsive design)

¥Responsive design

flex 工具前面使用断点变体如 md: 仅在 medium 屏幕尺寸及以上时应用工具:

<div class="flex-none md:flex-1 ...">
<!-- ... -->
</div>

请参阅 变体文档 详细了解如何使用变体。

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