# drillDown

Treemap: enter a branch by its normalized data index. Requires drilldown.

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

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## Definition

```typescript
drillDown(nodeIndex: number): Promise<TreemapDrillChangeEventDetail | null | SunburstDrillChangeEventDetail | IcicleDrillChangeEventDetail | DendrogramDrillChangeEventDetail>
```

| Arguments | Type | Required |
| --- | --- | --- |
| `nodeIndex` | `number` | Required |

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

- [TreemapDrillChangeEventDetail](https://chart.syidax.com/docs/types/TreemapDrillChangeEventDetail.md) — Type definition
- [SunburstDrillChangeEventDetail](https://chart.syidax.com/docs/types/SunburstDrillChangeEventDetail.md) — Type definition
- [IcicleDrillChangeEventDetail](https://chart.syidax.com/docs/types/IcicleDrillChangeEventDetail.md) — Type definition
- [DendrogramDrillChangeEventDetail](https://chart.syidax.com/docs/types/DendrogramDrillChangeEventDetail.md) — Type definition

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## Related charts

- [sy-treemap](https://chart.syidax.com/docs/components/treemap.md#method-drillDown)
- [sy-sunburst](https://chart.syidax.com/docs/components/sunburst.md#method-drillDown)
- [sy-icicle](https://chart.syidax.com/docs/components/icicle.md#method-drillDown)
- [sy-dendrogram](https://chart.syidax.com/docs/components/dendrogram.md#method-drillDown)