# GridHistoryChangedDetail

Fields, allowed values, and APIs that use GridHistoryChangedDetail.

Canonical: https://grid.syidax.com/docs/types/GridHistoryChangedDetail/

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## Type definition

A question mark (?) marks an optional field; readonly marks a value you should not change directly. A union (|) accepts one of the listed forms. Functions are callbacks that Grid invokes at the relevant point.

```typescript
export interface GridHistoryChangedDetail {
  kind: 'recorded' | 'undone' | 'redone' | 'cleared';
  depth: { undo: number; redo: number };
  label?: string;
}
```

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## APIs using this type

- [historyChanged](https://grid.syidax.com/docs/events/historyChanged.md) — Emitted when undo/redo history changes. Update button availability and current depths.