# showTooltipAtSlice

Pie-only — programmatic tooltip open.

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

<a id="definition"></a>

## Definition

```typescript
showTooltipAtSlice(idOrIndex: string | number): Promise<PieChartSliceEventDetail | null>
```

| Arguments | Type | Required |
| --- | --- | --- |
| `idOrIndex` | `string \| number` | Required |

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

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

<a id="related"></a>

## Related charts

- [sy-pie-chart](https://chart.syidax.com/docs/components/pie.md#method-showTooltipAtSlice)