[**ink-scroll-view**](../README.md)

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# Interface: ControlledScrollViewRef

## Properties

### getBottomOffset()

> **getBottomOffset**: () => `number`

Gets the maximum scroll offset (content height - viewport height).

#### Returns

`number`

#### Remarks

This represents the scroll offset required to view the very bottom of the content.
It is clamped to 0 if the content fits entirely within the viewport.

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### getContentHeight()

> **getContentHeight**: () => `number`

Gets the total height of the content.

#### Returns

`number`

The sum of heights of all child items.

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### getItemHeight()

> **getItemHeight**: (`index`) => `number`

Gets the height of a specific item by its index.

#### Parameters

##### index

`number`

The index of the child item.

#### Returns

`number`

The measured height of the item.

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### getItemPosition()

> **getItemPosition**: (`index`) => \{ `height`: `number`; `top`: `number`; \} \| `null`

Gets the absolute position and dimensions of a specific item.

#### Parameters

##### index

`number`

The index of the child item.

#### Returns

\{ `height`: `number`; `top`: `number`; \} \| `null`

Object containing `top` (offset from content start) and `height`, or `null` if the index is invalid.

#### Remarks

This method uses a cached offset calculation system (`itemOffsetsRef`) for performance.
It calculates offsets lazily and caches them until the underlying measurements change.

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### getViewportHeight()

> **getViewportHeight**: () => `number`

Gets the current height of the visible viewport.

#### Returns

`number`

The height of the viewport container.

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### remeasure()

> **remeasure**: () => `void`

Re-measures the ScrollView viewport dimensions.

#### Returns

`void`

#### Remarks

Explicitly triggers a measurement of the viewport Box. This is necessary because
Ink does not automatically detect terminal window resizes or parent layout changes
that might affect the viewport size.

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### remeasureItem()

> **remeasureItem**: (`index`) => `void`

Triggers re-measurement of a specific child item.

#### Parameters

##### index

`number`

The index of the child to re-measure.

#### Returns

`void`

#### Remarks

Forces the `MeasurableItem` wrapper for the specified index to re-run `measureElement`.
Use this when a child's content changes internally (e.g., expanding text) without changing props.
