# DropdownButtonOpenEvent

typedef

Fired when the dropdown should be opened. It will not be fired when the button [is disabled](module_ui_dropdown_button_dropdownbutton-DropdownButton.md#member-isEnabled).

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-ui/src/dropdown/button/dropdownbutton.ts#L26)

<a id="properties">

## Properties

<a id="member-args">

### `args: [ ]`

<a id="member-name">

### `name: 'open'`

#### Value

`object`

## Fired by

* [DropdownButton#open](module_ui_dropdown_button_dropdownbutton-DropdownButton.md#event-open)

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Full index of the CKEditor 5 API reference: [llms.txt](llms.txt)