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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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| Param | Description | Type | Default value |
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| ----- | ----------- | ---- | ------------- |
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| defaultOpenKeys | array with the keys of default opened sub menus | | |
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| defaultSelectedKeys | array with the keys of default selected menu items | string\[] | |
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| forceSubMenuRender | render submenu into DOM before it shows | boolean | false |
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| inlineCollapsed | specifies the collapsed status when menu is inline mode | boolean | - |
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| inlineIndent | indent px of inline menu item on each level | number | 24 |
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| mode | type of the menu; `vertical`, `horizontal`, and `inline` modes are supported | string: `vertical` \| `vertical-right` \| `horizontal` \| `inline` | `vertical` |
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| multiple | Allow selection of multiple items | boolean | false |
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| openKeys(.sync) | array with the keys of currently opened sub menus | string\[] | |
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| selectable | allow selecting menu items | boolean | true |
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| selectedKeys(v-model) | array with the keys of currently selected menu items | string\[] | |
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| style | style of the root node | object | |
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| subMenuCloseDelay | delay time to hide submenu when mouse leave, unit: second | number | 0.1 |
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| subMenuOpenDelay | delay time to show submenu when mouse enter, unit: second | number | 0 |
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| theme | color theme of the menu | string: `light` `dark` | `light` |
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### Menu Events
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| Events Name | Description | Arguments |
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| --- | --- | --- |
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| click | callback executed when a menu item is clicked | function({ item, key, keyPath }) |
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| deselect | callback executed when a menu item is deselected, only supported for multiple mode | function({ item, key, selectedKeys }) |
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| openChange | called when open/close sub menu | function(openKeys: string\[]) |
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| select | callback executed when a menu item is selected | function({ item, key, selectedKeys }) |
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### Menu.Item
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| Param | Description | Type | Default value |
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| ----- | ----------- | ---- | ------------- |
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| disabled | whether menu item is disabled or not | boolean | false |
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| key | unique id of the menu item | string | |
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### Menu.SubMenu
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| Param | Description | Type | Default value |
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| ----- | ----------- | ---- | ------------- |
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| children | sub menus or sub menu items | Array<MenuItem\|SubMenu> | |
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| disabled | whether sub menu is disabled or not | boolean | false |
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| key | unique id of the sub menu | string | |
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| title | title of the sub menu | string\|slot | |
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### Menu.SubMenu Events
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| Events Name | Description | Arguments |
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| --- | --- | --- |
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| titleClick | callback executed when the sub menu title is clicked | function({ key, domEvent }) |
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### Menu.ItemGroup
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| Param | Description | Type | Default value |
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| ----- | ----------- | ---- | ------------- |
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| children | sub menu items | MenuItem\[] | |
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| title | title of the group | string\|slot | |
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### Menu.Divider
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Divider line in between menu items, only used in vertical popup Menu or Dropdown Menu.
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