# refreshRowHeights

Recalculates row heights after content or height callback inputs change.

Canonical: https://grid.syidax.com/docs/methods/refreshRowHeights/

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## What does this API do?

Recalculates row heights after content or height callback inputs change.

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## Exact input and result types

```typescript
refreshRowHeights(): Promise<void>
```

| Arguments | Required | Type |
| --- | --- | --- |

The return type is `Promise<void>`.

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## Usage flow

After registering and initializing the Grid element, call grid.refreshRowHeights(…). Read the return value with await. For methods returning a boolean or report, inspect the result before continuing.

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## Feature explanations and examples

- [Large data sets](https://grid.syidax.com/docs/features/virtualization.md) — Virtualization renders only row and column DOM needed near the viewport. It is separate from row models that fetch only part of the data from a server.