# valueParser

Converts input text to the stored type, for example by normalizing numbers or dates.

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

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## What does this API do?

Converts input text to the stored type, for example by normalizing numbers or dates.

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## Exact input and result types

```typescript
valueParser?: GridCallback<[ValueParserParams<TData, TValue, TContext>], TValue>
```

| Item | Value |
| --- | --- |
| Required | Optional |
| Input type | GridCallback<[ValueParserParams<TData, TValue, TContext>], TValue> |

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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

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

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## Feature explanations and examples

- [Cell and row editing](https://grid.syidax.com/docs/features/cell-editing.md) — Cell editing changes one value immediately; full-row editing commits multiple fields as one row operation. editor specifies the input UI, while editable controls write access.