# headerTooltip

Supporting description for the header.

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

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## What does this API do?

Supporting description for the header.

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## Exact input and result types

```typescript
headerTooltip?: string
```

| Item | Value |
| --- | --- |
| Required | Optional |
| Input type | string |

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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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## Feature explanations and examples

- [Cell tooltips](https://grid.syidax.com/docs/features/tooltip.md) — Tooltips help users briefly inspect truncated names or long descriptions. Do not hide essential errors or guidance exclusively inside tooltips.