# field

Required field path for reading a value from source rows. Use the data key, not a display heading.

Canonical: https://grid.syidax.com/docs/columns/field/

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## What does this API do?

Required field path for reading a value from source rows. Use the data key, not a display heading.

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## Exact input and result types

```typescript
field: GridFieldPath<TData>
```

| Item | Value |
| --- | --- |
| Required | Required |
| Input type | GridFieldPath<TData> |

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## Usage flow

Set this on an individual column object in columnDefs. Pass arrays, objects, and callbacks through JavaScript, and use new arrays or objects when applying changes.

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## Read related types

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

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## Feature explanations and examples

- [Data updates](https://grid.syidax.com/docs/features/data-updates.md) — Replace rowData when receiving a complete query result. For partial changes, pass add, update, and remove to applyTransaction. Updates match through getRowId, not display positions.