# GridRefInvalidationReason

Fields, allowed values, and APIs that use GridRefInvalidationReason.

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

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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 type GridRefInvalidationReason =
  | 'removed'
  | 'definitions-replaced'
  | 'data-replaced'
  | 'disconnected';
```

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## Contracts containing this type

- [GridLiveObjectEvent](https://grid.syidax.com/docs/types/GridLiveObjectEvent.md)
- [GridLiveRef](https://grid.syidax.com/docs/types/GridLiveRef.md)