# showTooltipAtValue

Gauge-only — open the value tooltip at a specific value's angle (analogue of showTooltipAtSlice).

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

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## Definition

```typescript
showTooltipAtValue(value: number): Promise<GaugeChartPointerEventDetail | null>
```

| Arguments | Type | Required |
| --- | --- | --- |
| `value` | `number` | Required |

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

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

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## Related charts

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