# MarkerCollectionChangeContentEvent

typedef

Fired whenever change on [`ModelDocument`](module_engine_model_document-ModelDocument.md) is done inside [marker range](module_engine_model_markercollection-Marker.md#member-_liveRange). This is a delegated [ModelLiveRange change:content event](module_engine_model_liverange-ModelLiveRange.md#event-change:content).

When marker is removed from [MarkerCollection](module_engine_model_markercollection-MarkerCollection.md), all event listeners listening to it should be removed. It is best to do it on [MarkerCollection update event](module_engine_model_markercollection-MarkerCollection.md#event-update).

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/model/markercollection.ts#L558)

#### Value

`ModelLiveRangeChangeContentEvent`

## Fired by

* [Marker#change:content](module_engine_model_markercollection-Marker.md#event-change:content)

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