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143 lines
7.2 KiB
Markdown
143 lines
7.2 KiB
Markdown
---
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category: Components
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group: Navigation
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title: Menu
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cover: https://mdn.alipayobjects.com/huamei_7uahnr/afts/img/A*KeyQQL5iKkkAAAAAAAAAAAAADrJ8AQ/original
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---
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A versatile menu for navigation.
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## When To Use
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Navigation is an important part of any website, as a good navigation setup allows users to move around the site quickly and efficiently. Ant Design offers two navigation options: top and side. Top navigation provides all the categories and functions of the website. Side navigation provides the multi-level structure of the website.
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More layouts with navigation: [Layout](/components/layout).
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## Notes for developers
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- Menu is rendered as a `ul` element, so it only supports [`li` and `script-supporting` elements](https://html.spec.whatwg.org/multipage/grouping-content.html#the-ul-element) as children nodes。Your customized node should be wrapped by `Menu.Item`.
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- Menu needs to collect its node structure, so its children should be `Menu.*` or encapsulated HOCs.
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## Examples
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<!-- prettier-ignore -->
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<code src="./demo/horizontal.tsx">Top Navigation</code>
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<code src="./demo/inline.tsx">Inline menu</code>
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<code src="./demo/inline-collapsed.tsx">Collapsed inline menu</code>
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<code src="./demo/sider-current.tsx">Open current submenu only</code>
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<code src="./demo/vertical.tsx">Vertical menu</code>
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<code src="./demo/theme.tsx">Menu Themes</code>
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<code src="./demo/submenu-theme.tsx">Sub-menu theme</code>
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<code src="./demo/switch-mode.tsx">Switch the menu type</code>
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<code src="./demo/style-debug.tsx" debug>Style debug</code>
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<code src="./demo/menu-v4.tsx" debug>Menu v4</code>
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## API
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### Menu
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| Param | Description | Type | Default value | Version |
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| --- | --- | --- | --- | --- |
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| defaultOpenKeys | Array with the keys of default opened sub menus | string\[] | - | |
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| defaultSelectedKeys | Array with the keys of default selected menu items | string\[] | - | |
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| expandIcon | custom expand icon of submenu | ReactNode \| `(props: SubMenuProps & { isSubMenu: boolean }) => ReactNode` | - | 4.9.0 |
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| forceSubMenuRender | Render submenu into DOM before it becomes visible | boolean | false | |
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| inlineCollapsed | Specifies the collapsed status when menu is inline mode | boolean | - | |
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| inlineIndent | Indent (in pixels) of inline menu items on each level | number | 24 | |
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| items | Menu item content | [ItemType\[\]](#itemtype) | - | 4.20.0 |
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| mode | Type of menu | `vertical` \| `horizontal` \| `inline` | `vertical` | |
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| multiple | Allows selection of multiple items | boolean | false | |
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| openKeys | Array with the keys of currently opened sub-menus | string\[] | - | |
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| overflowedIndicator | Customized the ellipsis icon when menu is collapsed horizontally | ReactNode | `<EllipsisOutlined />` | |
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| selectable | Allows selecting menu items | boolean | true | |
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| selectedKeys | Array with the keys of currently selected menu items | string\[] | - | |
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| style | Style of the root node | CSSProperties | - | |
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| subMenuCloseDelay | Delay time to hide submenu when mouse leaves (in seconds) | number | 0.1 | |
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| subMenuOpenDelay | Delay time to show submenu when mouse enters, (in seconds) | number | 0 | |
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| theme | Color theme of the menu | `light` \| `dark` | `light` | |
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| triggerSubMenuAction | Which action can trigger submenu open/close | `hover` \| `click` | `hover` | |
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| onClick | Called when a menu item is clicked | function({ item, key, keyPath, domEvent }) | - | |
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| onDeselect | Called when a menu item is deselected (multiple mode only) | function({ item, key, keyPath, selectedKeys, domEvent }) | - | |
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| onOpenChange | Called when sub-menus are opened or closed | function(openKeys: string\[]) | - | |
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| onSelect | Called when a menu item is selected | function({ item, key, keyPath, selectedKeys, domEvent }) | - | |
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> More options in [rc-menu](https://github.com/react-component/menu#api)
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### ItemType
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> type ItemType = [MenuItemType](#MenuItemType) | [SubMenuType](#SubMenuType) | [MenuItemGroupType](#MenuItemGroupType) | [MenuDividerType](#MenuDividerType);
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#### MenuItemType
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| Param | Description | Type | Default value | Version |
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| -------- | ------------------------------------ | --------- | ------------- | ------- |
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| danger | Display the danger style | boolean | false | |
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| disabled | Whether menu item is disabled | boolean | false | |
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| icon | The icon of the menu item | ReactNode | - | |
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| key | Unique ID of the menu item | string | - | |
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| label | Menu label | ReactNode | - | |
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| title | Set display title for collapsed item | string | - | |
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#### SubMenuType
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<!-- prettier-ignore -->
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| Property | Description | Type | Default value | Version |
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| --- | --- | --- | --- | --- |
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| children | Sub-menus or sub-menu items | [ItemType\[\]](#itemtype) | - | |
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| disabled | Whether sub-menu is disabled | boolean | false | |
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| icon | Icon of sub menu | ReactNode | - | |
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| key | Unique ID of the sub-menu | string | - | |
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| label | Menu label | ReactNode | - | |
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| popupClassName | Sub-menu class name, not working when `mode="inline"` | string | - | |
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| popupOffset | Sub-menu offset, not working when `mode="inline"` | \[number, number] | - | |
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| theme | Color theme of the SubMenu (inherits from Menu by default) | | `light` \| `dark` | - | |
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| onTitleClick | Callback executed when the sub-menu title is clicked | function({ key, domEvent }) | - | |
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#### MenuItemGroupType
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Define `type` as `group` to make as group:
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```ts
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const groupItem = {
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type: 'group', // Must have
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label: 'My Group',
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children: [],
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};
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```
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| Param | Description | Type | Default value | Version |
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| -------- | ---------------------- | --------------------------------- | ------------- | ------- |
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| children | Sub-menu items | [MenuItemType\[\]](#menuitemtype) | - | |
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| label | The title of the group | ReactNode | - | |
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#### MenuDividerType
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Divider line in between menu items, only used in vertical popup Menu or Dropdown Menu. Need define the `type` as `divider`：
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```ts
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const dividerItem = {
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type: 'divider', // Must have
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};
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```
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| Param | Description | Type | Default value | Version |
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| ------ | ---------------------- | ------- | ------------- | ------- |
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| dashed | Whether line is dashed | boolean | false | |
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## FAQ
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### Why will Menu's children be rendered twice?
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Menu collects structure info with [twice-render](https://github.com/react-component/menu/blob/f4684514096d6b7123339cbe72e7b0f68db0bce2/src/Menu.tsx#L543) to support HOC usage. Merging into one render may cause the logic to become much more complex. Contributions to help improve the collection logic are welcomed.
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### Why Menu do not responsive collapse in Flex layout?
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Menu will render fully item in flex layout and then collapse it. You need tell flex not consider Menu width to enable responsive ([online demo](https://codesandbox.io/s/ding-bu-dao-hang-antd-4-21-7-forked-5e3imy?file=/demo.js)):
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```jsx
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<div style={{ flex }}>
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<div style={{ ... }}>Some Content</div>
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<Menu style={{ minWidth: 0, flex: "auto" }} />
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</div>
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```
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