弹性布局 Flex
赞助
设置组件之间的间距,设置各种水平、垂直对齐方式
与 Space 组件的区别
Space为内联元素提供间距,自身以inline-flex排列子元素(不额外包裹),适用于行内多个元素的等距排列。Flex为块级元素提供间距,自身以flex排列子元素,适用于垂直或水平方向上的布局,并提供了更多的灵活性和控制能力。
基本使用
通过 vertical 切换主轴方向
Show Code
vue
<script setup lang="ts">
import { ref } from 'vue'
const directionOptions = ref([
{
label: 'horizontal',
value: 'horizontal'
},
{
label: 'vertical',
value: 'vertical'
}
])
const direction = ref('horizontal')
const baseStyle = {
width: '25%',
height: '54px'
}
</script>
<template>
<Flex vertical>
<RadioGroup :options="directionOptions" v-model:value="direction" />
<Flex :vertical="direction === 'vertical'">
<div v-for="n in 4" :key="n" :style="{ ...baseStyle, background: `${n % 2 ? '#1677ffbf' : '#1677ff'}` }" />
</Flex>
</Flex>
</template>对齐方式
通过 justify 与 align 分别控制主轴与交叉轴的对齐方式
justify:
align:
Primary
Primary
Primary
Primary
Show Code
vue
<script setup lang="ts">
import { ref } from 'vue'
const justifyOptions = ref([
{
label: 'flex-start',
value: 'flex-start'
},
{
label: 'center',
value: 'center'
},
{
label: 'flex-end',
value: 'flex-end'
},
{
label: 'space-between',
value: 'space-between'
},
{
label: 'space-around',
value: 'space-around'
},
{
label: 'space-evenly',
value: 'space-evenly'
}
])
const alignOptions = ref([
{
label: 'flex-start',
value: 'flex-start'
},
{
label: 'center',
value: 'center'
},
{
label: 'flex-end',
value: 'flex-end'
}
])
const justify = ref(justifyOptions.value[0].value)
const alignItems = ref(alignOptions.value[0].value)
const boxStyle = {
width: '100%',
height: '120px',
borderRadius: '6px',
border: '1px solid #40a9ff'
}
</script>
<template>
<Flex vertical :gap="12">
<Flex vertical :gap="4">
<span>justify:</span>
<RadioGroup v-model:value="justify" button :options="justifyOptions" />
</Flex>
<Flex vertical :gap="4">
<span>align:</span>
<RadioGroup v-model:value="alignItems" button :options="alignOptions" />
</Flex>
<Flex :style="{ ...boxStyle }" :justify="justify" :align="alignItems">
<Button type="primary">Primary</Button>
<Button type="primary">Primary</Button>
<Button type="primary">Primary</Button>
<Button type="primary">Primary</Button>
</Flex>
</Flex>
</template>设置间距
通过 gap 设置间距,可选档位或自定义数值
Primary
Default
Dashed
Link
Show Code
vue
<script setup lang="ts">
import { ref } from 'vue'
const gapOptions = ref([
{
label: 'small',
value: 'small'
},
{
label: 'middle',
value: 'middle'
},
{
label: 'large',
value: 'large'
},
{
label: 'customize',
value: 'customize'
}
])
const gapSize = ref('middle')
const customGapSize = ref(16)
</script>
<template>
<Flex vertical>
<RadioGroup :options="gapOptions" v-model:value="gapSize" />
<Slider v-if="gapSize === 'customize'" v-model:value="customGapSize" />
<Flex :gap="gapSize !== 'customize' ? gapSize : customGapSize">
<Button type="primary">Primary</Button>
<Button>Default</Button>
<Button type="dashed">Dashed</Button>
<Button type="link">Link</Button>
</Flex>
</Flex>
</template>自动换行
wrap 开启换行,width 限定容器宽度,gap 数组分别设置水平与垂直间距
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Button
Show Code
vue
<template>
<Flex wrap="wrap" :width="600" :gap="[8, 16]">
<Button v-for="n in 16" :key="n" type="primary">Button</Button>
</Flex>
</template>自定义标签
通过 component 指定渲染的标签或组件,便于语义化布局
- 列表项 1
- 列表项 2
- 列表项 3
Show Code
vue
<template>
<Flex component="ul" vertical :gap="8" class="flex-list">
<li v-for="n in 3" :key="n">列表项 {{ n }}</li>
</Flex>
</template>
<style lang="less" scoped>
.flex-list {
padding: 0;
margin: 0;
list-style: none;
li {
padding: 8px 12px;
background: var(--va-fill-color-1);
border-radius: 6px;
}
}
</style>容器伸缩
通过 flex 设置容器自身作为 flex 子项时的伸缩比,示例两块按 1 : 2 分配剩余宽度,无需另写 style
flex: 1
flex: 2
Show Code
vue
<template>
<Flex gap="small">
<Flex flex="1" justify="center" align="center" class="flex-stretch-demo">flex: 1</Flex>
<Flex flex="2" justify="center" align="center" class="flex-stretch-demo">flex: 2</Flex>
</Flex>
</template>
<style lang="less" scoped>
.flex-stretch-demo {
height: 64px;
font-size: 14px;
font-weight: 500;
color: var(--va-primary-color);
background: var(--va-primary-bg-color);
border-radius: 8px;
}
</style>组合使用
嵌套使用可实现更复杂的布局,主轴与交叉轴可分别控制
Show Code
vue
<template>
<Card :style="{ width: '620px', maxWidth: '100%' }" :body-style="{ padding: 0, overflow: 'hidden' }">
<Flex justify="space-between">
<img
class="flex-combination-logo"
src="https://themusecatcher.github.io/vue-amazing-ui/amazing-logo.svg"
alt="Vue Amazing UI"
/>
<Flex vertical align="flex-end" justify="space-between" class="flex-combination-body">
<p class="flex-combination-quote"
>“Vue Amazing UI is an enterprise-class UI library built with Vue 3 and TypeScript.”</p
>
<Button type="primary" href="https://themusecatcher.github.io/vue-amazing-ui/" target="_blank"
>Get Started</Button
>
</Flex>
</Flex>
</Card>
</template>
<style lang="less" scoped>
.flex-combination-logo {
display: block;
width: 273px;
height: 273px;
object-fit: contain;
}
.flex-combination-body {
flex: 1;
padding: 32px;
}
.flex-combination-quote {
margin: 0;
font-size: 24px;
font-weight: 600;
line-height: 1.35;
color: var(--va-text-color-1);
}
</style>APIs
Flex Props
| 名称 | 说明 | 类型 | 默认值 |
|---|---|---|---|
| width | 弹性区域总宽度,单位 px | string | number | 'auto' |
| flex | 容器自身作为 flex 子项时的伸缩简写,数值即 flex-grow,字符串原样透传 | string | number | undefined |
| vertical | flex 主轴的方向是否垂直,vertical 使用 flex-direction: column | boolean | false |
| wrap | 设置元素单行显示还是多行显示;参考 flex-wrap | 'nowrap' | 'wrap' | 'wrap-reverse' | 'nowrap' |
| justify | 设置元素在主轴方向上的对齐方式;参考 justify-content | string | 'normal' |
| align | 设置元素在交叉轴方向上的对齐方式;参考 align-items | string | 'normal' |
| gap | 间距大小,数组时表示: [水平间距, 垂直间距] | number | number[] | 'small' | 'middle' | 'large' | 'middle' |
| component | 渲染的标签名或组件,用于语义化布局 | string | Component | 'div' |
无子元素时不参与布局(不占父级 flex 的一份间距)。
Slots
| 名称 | 说明 | 用法 |
|---|---|---|
| default | 自定义内容 | v-slot:default |