# MapperViewToModelPositionEventData

typedef

Data pipeline object that can store and pass data between callbacks. The callback should add `modelPosition` value to that object with calculated [model position](module_engine_model_position-ModelPosition.md).

[See source](https://github.com/ckeditor/ckeditor5/blob/master/packages/ckeditor5-engine/src/conversion/mapper.ts#L1404)

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## Properties

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### `mapper: Mapper`

Mapper instance that fired the event.

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### `modelPosition?: ModelPosition`

The callback should add `modelPosition` value to that object with calculated [model position](module_engine_model_position-ModelPosition.md).

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### `viewPosition: ViewPosition`

The view position.

#### Value

`object`

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