# ViewDocumentTodoCheckboxChangeEvent

typedef

Fired when the to-do list checkbox is toggled.

Introduced by [`TodoCheckboxChangeObserver`](module_list_todolist_todocheckboxchangeobserver-TodoCheckboxChangeObserver.md).

Note that this event is not available by default. To make it available, [`TodoCheckboxChangeObserver`](module_list_todolist_todocheckboxchangeobserver-TodoCheckboxChangeObserver.md) needs to be added to [`EditingView`](module_engine_view_view-EditingView.md) by the [`addObserver`](module_engine_view_view-EditingView.md#function-addObserver) method.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-list/src/todolist/todocheckboxchangeobserver.ts#L58)

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## Properties

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### `args: [ data: ViewDocumentDomEventData<Event> ]`

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### `name: 'todoCheckboxChange'`

#### Value

`object`

## Fired by

* [ViewDocument#todoCheckboxChange](module_engine_view_document-ViewDocument.md#event-todoCheckboxChange)

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