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## API
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````html
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<template>
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<a-menu>
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<a-menu-item>菜单项</a-menu-item>
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<a-sub-menu title="子菜单">
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<a-menu-item>子菜单项</a-menu-item>
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</a-sub-menu>
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</a-menu>
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</template>
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````
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### Menu
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| defaultOpenKeys | 初始展开的 SubMenu 菜单项 key 数组 | | |
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| defaultSelectedKeys | 初始选中的菜单项 key 数组 | string\[] | |
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| forceSubMenuRender | 在子菜单展示之前就渲染进 DOM | boolean | false |
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| inlineCollapsed | inline 时菜单是否收起状态 | boolean | - |
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| inlineIndent | inline 模式的菜单缩进宽度 | number | 24 |
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| mode | 菜单类型，现在支持垂直、水平、和内嵌模式三种 | string: `vertical` `vertical-right` `horizontal` `inline` | `vertical` |
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| multiple | 是否允许多选 | boolean | false |
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| openKeys(.sync) | 当前展开的 SubMenu 菜单项 key 数组 | string\[] | |
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| selectable | 是否允许选中 | boolean | true |
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| selectedKeys(v-model) | 当前选中的菜单项 key 数组 | string\[] | |
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| subMenuCloseDelay | 用户鼠标离开子菜单后关闭延时，单位：秒 | number | 0.1 |
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| subMenuOpenDelay | 用户鼠标进入子菜单后开启延时，单位：秒 | number | 0 |
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| theme | 主题颜色 | string: `light` `dark` | `light` |
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### Menu事件
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| 事件名称 | 说明 | 回调参数 |
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| --- | --- | --- |
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| click | 点击 MenuItem 调用此函数 | function({ item, key, keyPath }) |
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| deselect | 取消选中时调用，仅在 multiple 生效 | function({ item, key, selectedKeys }) |
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| openChange | SubMenu 展开/关闭的回调 | function(openKeys: string\[]) |
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| select | 被选中时调用 | function({ item, key, selectedKeys }) |
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### Menu.Item
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| disabled | 是否禁用 | boolean | false |
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| key | item 的唯一标志 | string | |
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| title | 设置收缩时展示的悬浮标题 | string | |
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### Menu.SubMenu
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| disabled | 是否禁用 | boolean | false |
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| key | 唯一标志 | string | |
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| title | 子菜单项值 | string\|slot | |
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Menu.SubMenu 的子元素必须是 `MenuItem` 或者 `SubMenu`.
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### SubMenu事件
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| 事件名称 | 说明 | 回调参数 |
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| --- | --- | --- |
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| titleClick | 点击子菜单标题 | ({ key, domEvent }) |
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### Menu.ItemGroup
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| 参数 | 说明 | 类型 | 默认值 |
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| --- | --- | --- | --- |
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| title | 分组标题 | string\|\|function\|slot | |
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Menu.ItemGroup 的子元素必须是 `MenuItem`.
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### Menu.Divider
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菜单项分割线，只用在弹出菜单内。
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