# showTooltipAtPoint

Open the tooltip for a dot programmatically. `pointIndex` is the category (row) index; the optional `seriesIndex` selects a group within that row (defaults to the first visible group's dot in the row). Returns the emitted tooltip detail, or null when no dot resolves / the tooltip is disabled.

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

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## Definition

```typescript
showTooltipAtPoint(pointIndex: number, seriesIndex?: number | 'left' | 'right'): Promise<CartesianTooltipEventDetail | null>
```

| Arguments | Type | Required |
| --- | --- | --- |
| `pointIndex` | `number` | Required |
| `seriesIndex` | `number \| 'left' \| 'right'` | Optional |

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

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

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## Related charts

- [sy-line-chart](https://chart.syidax.com/docs/components/line.md#method-showTooltipAtPoint)
- [sy-area-chart](https://chart.syidax.com/docs/components/area.md#method-showTooltipAtPoint)
- [sy-column-chart](https://chart.syidax.com/docs/components/column.md#method-showTooltipAtPoint)
- [sy-bar-chart](https://chart.syidax.com/docs/components/bar.md#method-showTooltipAtPoint)
- [sy-scatter-chart](https://chart.syidax.com/docs/components/scatter.md#method-showTooltipAtPoint)
- [sy-lollipop-chart](https://chart.syidax.com/docs/components/lollipop.md#method-showTooltipAtPoint)
- [sy-dumbbell-chart](https://chart.syidax.com/docs/components/dumbbell.md#method-showTooltipAtPoint)
- [sy-tornado-chart](https://chart.syidax.com/docs/components/tornado.md#method-showTooltipAtPoint)
- [sy-dot-plot-chart](https://chart.syidax.com/docs/components/dot-plot.md#method-showTooltipAtPoint)
- [sy-variwide-chart](https://chart.syidax.com/docs/components/variwide.md#method-showTooltipAtPoint)
- [sy-marimekko-chart](https://chart.syidax.com/docs/components/marimekko.md#method-showTooltipAtPoint)
- [sy-pareto-chart](https://chart.syidax.com/docs/components/pareto.md#method-showTooltipAtPoint)
- [sy-histogram-chart](https://chart.syidax.com/docs/components/histogram.md#method-showTooltipAtPoint)
- [sy-pictorial-chart](https://chart.syidax.com/docs/components/pictorial.md#method-showTooltipAtPoint)
- [sy-treemap](https://chart.syidax.com/docs/components/treemap.md#method-showTooltipAtPoint)
- [sy-sunburst](https://chart.syidax.com/docs/components/sunburst.md#method-showTooltipAtPoint)
- [sy-icicle](https://chart.syidax.com/docs/components/icicle.md#method-showTooltipAtPoint)
- [sy-dendrogram](https://chart.syidax.com/docs/components/dendrogram.md#method-showTooltipAtPoint)
- [sy-theme-river](https://chart.syidax.com/docs/components/theme-river.md#method-showTooltipAtPoint)
- [sy-parallel-coordinates](https://chart.syidax.com/docs/components/parallel-coordinates.md#method-showTooltipAtPoint)
- [sy-geo-map](https://chart.syidax.com/docs/components/geo-map.md#method-showTooltipAtPoint)
- [sy-surface-3d](https://chart.syidax.com/docs/components/surface-3d.md#method-showTooltipAtPoint)
- [sy-bar-3d](https://chart.syidax.com/docs/components/bar-3d.md#method-showTooltipAtPoint)
- [sy-scatter-3d](https://chart.syidax.com/docs/components/scatter-3d.md#method-showTooltipAtPoint)
- [sy-gantt-chart](https://chart.syidax.com/docs/components/gantt.md#method-showTooltipAtPoint)