# getBar3DData

Surface grid coordinates are row/column; generic tooltip methods use a row-major sample index.

Canonical: https://chart.syidax.com/docs/methods/getBar3DData/

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## Definition

```typescript
getBar3DData(): Promise<Bar3DDatum[]|null>
```

Return type: `Promise<Bar3DDatum[]|null>`. Call the method after element registration and await its Promise result.

- [Bar3DDatum](https://chart.syidax.com/docs/types/Bar3DDatum.md) — Type definition

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## Related charts