[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) › ConstantCaseIdentifier

```ts
const ConstantCaseIdentifier: identifier("CONSTANT_CASE")(String);
```

Defined in: [packages/common/src/Type.ts:5784](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Type.ts#L5784)

A validated CONSTANT_CASE identifier, such as `HTTP2_PORT`.

See [identifier](https://evolu.dev/docs/api-reference/common/Type/functions/identifier) for the grammar and the conversion functions.