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## API
### Dropdown
| Property | Description | Type | Default |
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| --- | --- | --- | --- |
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| disabled | whether the dropdown menu is disabled | boolean | - |
| getPopupContainer | to set the container of the dropdown menu. The default is to create a `div` element in `body` , you can reset it to the scrolling area and make a relative reposition. [example ](https://codepen.io/afc163/pen/zEjNOy?editors=0010 ) | Function(triggerNode) | `() => document.body` |
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| overlay(slot-scope) | the dropdown menu | [Menu ](/components/menu ) | - |
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| overlayClassName | Class name of the dropdown root element | string | - |
| overlayStyle | Style of the dropdown root element | object | - |
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| placement | placement of pop menu: `bottomLeft` `bottomCenter` `bottomRight` `topLeft` `topCenter` `topRight` | String | `bottomLeft` |
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| trigger | the trigger mode which executes the drop-down action, hover doesn't work on mobile device | Array< `click`\|`hover` \|`contextmenu` > | `['hover']` |
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| visible(v-model) | whether the dropdown menu is visible | boolean | - |
### events
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| Events Name | Description | Arguments |
| --- | --- | --- |
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| visibleChange | a callback function takes an argument: `visible` , is executed when the visible state is changed | function(visible) |
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You should use [Menu ](/components/menu/ ) as `overlay` . The menu items and dividers are also available by using `Menu.Item` and `Menu.Divider` .
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> Warning: You must set a unique `key` for `Menu.Item`.
>
> Menu of Dropdown is unselectable by default, you can make it selectable via `<Menu selectable>`.
### Dropdown.Button
| Property | Description | Type | Default |
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| --- | --- | --- | --- |
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| disabled | whether the dropdown menu is disabled | boolean | - |
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| overlay(slot-scope) | the dropdown menu | [Menu ](/components/menu ) | - |
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| placement | placement of pop menu: `bottomLeft` `bottomCenter` `bottomRight` `topLeft` `topCenter` `topRight` | String | `bottomLeft` |
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| size | size of the button, the same as [Button ](/components/button ) | string | `default` |
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| trigger | the trigger mode which executes the drop-down action | Array< `click`\|`hover` \|`contextmenu` > | `['hover']` |
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| type | type of the button, the same as [Button ](/components/button ) | string | `default` |
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| visible | whether the dropdown menu is visible | boolean | - |
### Dropdown.Button events
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| Events Name | Description | Arguments |
| --- | --- | --- |
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| click | a callback function, the same as [Button ](/components/button ), which will be executed when you click the button on the left | Function |
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| visibleChange | a callback function takes an argument: `visible` , is executed when the visible state is changed | Function |
