# GridFieldLeaf

Fields, allowed values, and APIs that use GridFieldLeaf.

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

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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 GridFieldLeaf =
  | string
  | number
  | boolean
  | bigint
  | symbol
  | null
  | undefined
  | Date
  | RegExp
  | Function;
```

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## Contracts containing this type

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