[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › snakeCaseToConstantCase

```ts
function snakeCaseToConstantCase(
  value: string & Brand<"SnakeCaseIdentifier">,
): string & Brand<"ConstantCaseIdentifier">;
```

Defined in: [packages/common/src/Type.ts:5939](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Type.ts#L5939)

Converts a [SnakeCaseIdentifier](https://evolu.dev/docs/api-reference/common/Type/variables/SnakeCaseIdentifier) to a [ConstantCaseIdentifier](https://evolu.dev/docs/api-reference/common/Type/variables/ConstantCaseIdentifier).

Converts `http2_port` to `HTTP2_PORT`. Use [constantCaseToSnakeCase](https://evolu.dev/docs/api-reference/common/Type/functions/constantCaseToSnakeCase) to
recover the original spelling.