# MarkerCollectionUpdateEvent

typedef

Fired whenever marker is added, updated or removed from `MarkerCollection`.

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/markercollection.ts#L576)

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## Properties

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### `args: [ marker: Marker, oldRange: ModelRange | null, newRange: ModelRange | null, oldMarkerData: MarkerData ]`

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### `` name: 'update' | `update:${ string }` ``

#### Value

`object`

## Fired by

* [MarkerCollection#update](module_engine_model_markercollection-MarkerCollection.md#event-update)

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