# selectRowAt

Treemap: enter a positive branch by ID, or null for the forest. Requires drilldown. Select a visible Gantt task by its normalized source index. Parallel Coordinates: source rows and independent axis geometry.

Canonical: https://chart.syidax.com/docs/methods/selectRowAt/

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## Definition

```typescript
selectRowAt(index: number): Promise<ParallelCoordinatesHitDetail|null>
```

| Arguments | Type | Required |
| --- | --- | --- |
| `index` | `number` | Required |

Return type: `Promise<ParallelCoordinatesHitDetail|null>`. Call the method after element registration and await its Promise result.

- [ParallelCoordinatesHitDetail](https://chart.syidax.com/docs/types/ParallelCoordinatesHitDetail.md) — Type definition

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## Related charts

- [sy-parallel-coordinates](https://chart.syidax.com/docs/components/parallel-coordinates.md#method-selectRowAt)