# getDieIndex

Wafer map: map index of a notch-frame lattice cell (`null` off-wafer or on other types).

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

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## Definition

```typescript
getDieIndex(col: number, row: number): Promise<DieIndexEntry | null>
```

| Arguments | Type | Required |
| --- | --- | --- |
| `col` | `number` | Required |
| `row` | `number` | Required |

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

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

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## Related charts

- [sy-wafer-map](https://chart.syidax.com/docs/components/wafer-map.md#method-getDieIndex)