# showFlowLinesTooltip

An asynchronous method. Check the argument and return types below.

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

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## Definition

```typescript
showFlowLinesTooltip(index: number, kind?: 'flow'|'location'): Promise<CartesianTooltipEventDetail|null>
```

| Arguments | Type | Required |
| --- | --- | --- |
| `index` | `number` | Required |
| `kind` | `'flow'\|'location'` | 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