Dropdown 下拉菜单
向下弹出的列表。
何时使用
当页面上的操作命令过多时,用此组件可以收纳操作元素。点击或移入触点,会出现一个下拉菜单。可在列表中进行选择,并执行相应的命令。
- 用于收罗一组命令操作。
- Select 用于选择,而 Dropdown 是命令集合。
代码演示
Hover me
最简单的下拉菜单。
<template>
<a-dropdown>
<a class="ant-dropdown-link" @click.prevent>
Hover me
<DownOutlined />
</a>
<template #overlay>
<a-menu>
<a-menu-item>
<a href="javascript:;">1st menu item</a>
</a-menu-item>
<a-menu-item>
<a href="javascript:;">2nd menu item</a>
</a-menu-item>
<a-menu-item>
<a href="javascript:;">3rd menu item</a>
</a-menu-item>
</a-menu>
</template>
</a-dropdown>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
import { DownOutlined } from '@ant-design/icons-vue';
export default defineComponent({
components: {
DownOutlined,
},
});
</script>
左边是按钮,右边是额外的相关功能菜单。可设置 icon
属性来修改右边的图标。
<template>
<div class="demo-dropdown-wrap">
<a-dropdown-button @click="handleButtonClick">
Dropdown
<template #overlay>
<a-menu @click="handleMenuClick">
<a-menu-item key="1">
<UserOutlined />
1st menu item
</a-menu-item>
<a-menu-item key="2">
<UserOutlined />
2nd menu item
</a-menu-item>
<a-menu-item key="3">
<UserOutlined />
3rd item
</a-menu-item>
</a-menu>
</template>
</a-dropdown-button>
<a-dropdown-button>
Dropdown
<template #overlay>
<a-menu @click="handleMenuClick">
<a-menu-item key="1">
<UserOutlined />
1st menu item
</a-menu-item>
<a-menu-item key="2">
<UserOutlined />
2nd menu item
</a-menu-item>
<a-menu-item key="3">
<UserOutlined />
3rd item
</a-menu-item>
</a-menu>
</template>
<template #icon><UserOutlined /></template>
</a-dropdown-button>
<a-dropdown-button disabled @click="handleButtonClick">
Dropdown
<template #overlay>
<a-menu @click="handleMenuClick">
<a-menu-item key="1">
<UserOutlined />
1st menu item
</a-menu-item>
<a-menu-item key="2">
<UserOutlined />
2nd menu item
</a-menu-item>
<a-menu-item key="3">
<UserOutlined />
3rd item
</a-menu-item>
</a-menu>
</template>
</a-dropdown-button>
<a-dropdown>
<template #overlay>
<a-menu @click="handleMenuClick">
<a-menu-item key="1">
<UserOutlined />
1st menu item
</a-menu-item>
<a-menu-item key="2">
<UserOutlined />
2nd menu item
</a-menu-item>
<a-menu-item key="3">
<UserOutlined />
3rd item
</a-menu-item>
</a-menu>
</template>
<a-button>
Button
<DownOutlined />
</a-button>
</a-dropdown>
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
import { UserOutlined, DownOutlined } from '@ant-design/icons-vue';
export default defineComponent({
setup() {
const handleButtonClick = (e: Event) => {
console.log('click left button', e);
};
const handleMenuClick = (e: Event) => {
console.log('click', e);
};
return {
handleButtonClick,
handleMenuClick,
};
},
components: {
UserOutlined,
DownOutlined,
},
});
</script>
<style lang="less" scoped>
.demo-dropdown-wrap :deep(.ant-dropdown-button) {
margin-right: 8px;
margin-bottom: 8px;
}
</style>
Hover me
分割线和不可用菜单项。
<template>
<a-dropdown>
<a class="ant-dropdown-link" @click.prevent>
Hover me
<DownOutlined />
</a>
<template #overlay>
<a-menu>
<a-menu-item key="0">
<a target="_blank" rel="noopener noreferrer" href="http://www.alipay.com/">
1st menu item
</a>
</a-menu-item>
<a-menu-item key="1">
<a target="_blank" rel="noopener noreferrer" href="http://www.taobao.com/">
2nd menu item
</a>
</a-menu-item>
<a-menu-divider />
<a-menu-item key="3" disabled>3rd menu item(disabled)</a-menu-item>
</a-menu>
</template>
</a-dropdown>
</template>
<script lant="ts">
import { defineComponent } from 'vue';
import { DownOutlined } from '@ant-design/icons-vue';
export default defineComponent({
components: {
DownOutlined,
},
});
</script>
支持 6 个弹出位置。
<template>
<div id="components-dropdown-demo-placement">
<template v-for="(placement, index) in placements" :key="placement">
<a-dropdown :placement="placement">
<a-button>{{ placement }}</a-button>
<template #overlay>
<a-menu>
<a-menu-item>
<a target="_blank" rel="noopener noreferrer" href="http://www.alipay.com/">
1st menu item
</a>
</a-menu-item>
<a-menu-item>
<a target="_blank" rel="noopener noreferrer" href="http://www.taobao.com/">
2nd menu item
</a>
</a-menu-item>
<a-menu-item>
<a target="_blank" rel="noopener noreferrer" href="http://www.tmall.com/">
3rd menu item
</a>
</a-menu-item>
</a-menu>
</template>
</a-dropdown>
<br v-if="index === 2" />
</template>
</div>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
export default defineComponent({
setup() {
return {
placements: ['bottomLeft', 'bottomCenter', 'bottomRight', 'topLeft', 'topCenter', 'topRight'],
};
},
});
</script>
<style>
#components-dropdown-demo-placement .ant-btn {
margin-right: 8px;
margin-bottom: 8px;
}
</style>
Click me
默认是移入触发菜单,可以点击触发。
<template>
<a-dropdown :trigger="['click']">
<a class="ant-dropdown-link" @click.prevent>
Click me
<DownOutlined />
</a>
<template #overlay>
<a-menu>
<a-menu-item key="0">
<a href="http://www.alipay.com/">1st menu item</a>
</a-menu-item>
<a-menu-item key="1">
<a href="http://www.taobao.com/">2nd menu item</a>
</a-menu-item>
<a-menu-divider />
<a-menu-item key="3">3rd menu item</a-menu-item>
</a-menu>
</template>
</a-dropdown>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
import { DownOutlined } from '@ant-design/icons-vue';
export default defineComponent({
components: {
DownOutlined,
},
});
</script>
默认是移入触发菜单,可以点击鼠标右键触发。
<template>
<a-dropdown :trigger="['contextmenu']">
<div
:style="{
textAlign: 'center',
background: '#f7f7f7',
height: '200px',
lineHeight: '200px',
color: '#777',
}"
>
Right Click on here
</div>
<template #overlay>
<a-menu>
<a-menu-item key="1">1st menu item</a-menu-item>
<a-menu-item key="2">2nd menu item</a-menu-item>
<a-menu-item key="3">3rd menu item</a-menu-item>
</a-menu>
</template>
</a-dropdown>
</template>
Hover me, Click menu item
点击菜单项后会触发事件,用户可以通过相应的菜单项 key 进行不同的操作。
<template>
<a-dropdown>
<a class="ant-dropdown-link" @click.prevent>
Hover me, Click menu item
<DownOutlined />
</a>
<template #overlay>
<a-menu @click="onClick">
<a-menu-item key="1">1st menu item</a-menu-item>
<a-menu-item key="2">2nd menu item</a-menu-item>
<a-menu-item key="3">3rd menu item</a-menu-item>
</a-menu>
</template>
</a-dropdown>
</template>
<script lang="ts">
import { defineComponent, VNodeChild } from 'vue';
import { DownOutlined } from '@ant-design/icons-vue';
interface MenuInfo {
key: string;
keyPath: string[];
item: VNodeChild;
domEvent: MouseEvent;
}
export default defineComponent({
setup() {
const onClick = ({ key }: MenuInfo) => {
console.log(`Click on item ${key}`);
};
return {
onClick,
};
},
components: {
DownOutlined,
},
});
</script>
Hover me
默认是点击关闭菜单,可以关闭此功能。
<template>
<a-dropdown v-model:visible="visible">
<a class="ant-dropdown-link" @click.prevent>
Hover me
<DownOutlined />
</a>
<template #overlay>
<a-menu @click="handleMenuClick">
<a-menu-item key="1">Clicking me will not close the menu.</a-menu-item>
<a-menu-item key="2">Clicking me will not close the menu also.</a-menu-item>
<a-menu-item key="3">Clicking me will close the menu</a-menu-item>
</a-menu>
</template>
</a-dropdown>
</template>
<script lang="ts">
import { defineComponent, ref, VNodeChild } from 'vue';
import { DownOutlined } from '@ant-design/icons-vue';
interface MenuInfo {
key: string;
keyPath: string[];
item: VNodeChild;
domEvent: MouseEvent;
}
export default defineComponent({
setup() {
const visible = ref(false);
const handleMenuClick = (e: MenuInfo) => {
if (e.key === '3') {
visible.value = false;
}
};
return {
visible,
handleMenuClick,
};
},
components: {
DownOutlined,
},
});
</script>
Cascading menu
传入的菜单里有多个层级。
<template>
<a-dropdown>
<a class="ant-dropdown-link" @click.prevent>
Cascading menu
<DownOutlined />
</a>
<template #overlay>
<a-menu>
<a-menu-item>1st menu item</a-menu-item>
<a-menu-item>2nd menu item</a-menu-item>
<a-sub-menu key="test" title="sub menu">
<a-menu-item>3rd menu item</a-menu-item>
<a-menu-item>4th menu item</a-menu-item>
</a-sub-menu>
<a-sub-menu title="disabled sub menu" disabled>
<a-menu-item>5d menu item</a-menu-item>
<a-menu-item>6th menu item</a-menu-item>
</a-sub-menu>
</a-menu>
</template>
</a-dropdown>
</template>
<script lang="ts">
import { defineComponent } from 'vue';
import { DownOutlined } from '@ant-design/icons-vue';
export default defineComponent({
components: {
DownOutlined,
},
});
</script>
API
属性如下
参数 | 说明 | 类型 | 默认值 |
---|---|---|---|
disabled | 菜单是否禁用 | boolean | - |
getPopupContainer | 菜单渲染父节点。默认渲染到 body 上,如果你遇到菜单滚动定位问题,试试修改为滚动的区域,并相对其定位。 | Function(triggerNode) | () => document.body |
overlay(v-slot) | 菜单 | Menu | - |
overlayClassName | 下拉根元素的类名称 | string | - |
overlayStyle | 下拉根元素的样式 | object | - |
placement | 菜单弹出位置:bottomLeft bottomCenter bottomRight topLeft topCenter topRight | String | bottomLeft |
trigger | 触发下拉的行为, 移动端不支持 hover | Array<click |hover |contextmenu > | [‘hover’] |
visible(v-model) | 菜单是否显示 | boolean | - |
overlay
菜单使用 Menu,还包括菜单项 Menu.Item
,分割线 Menu.Divider
。
注意: Menu.Item 必须设置唯一的 key 属性。
Dropdown 下的 Menu 默认不可选中。如果需要菜单可选中,可以指定
<Menu selectable>
.
事件
事件名称 | 说明 | 回调参数 |
---|---|---|
visibleChange | 菜单显示状态改变时调用,参数为 visible | function(visible) |
Dropdown.Button
参数 | 说明 | 类型 | 默认值 | 版本 |
---|---|---|---|---|
disabled | 菜单是否禁用 | boolean | - | |
icon | 右侧的 icon | VNode | slot | - | 1.5.0 |
overlay(v-slot) | 菜单 | Menu | - | |
placement | 菜单弹出位置:bottomLeft bottomCenter bottomRight topLeft topCenter topRight | String | bottomLeft | |
size | 按钮大小,和 Button 一致 | string | ‘default’ | |
trigger | 触发下拉的行为 | Array<click |hover |contextmenu > | [‘hover’] | |
type | 按钮类型,和 Button 一致 | string | ‘default’ | |
visible(v-model) | 菜单是否显示 | boolean | - |
Dropdown.Button 事件
事件名称 | 说明 | 回调参数 |
---|---|---|
click | 点击左侧按钮的回调,和 Button 一致 | Function |
visibleChange | 菜单显示状态改变时调用,参数为 visible | function(visible) |