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

```ts
const constVoid: Thunk<void> = constUndefined;
```

Defined in: [packages/common/src/Function.ts:298](https://github.com/evoluhq/evolu/blob/b0bdf9c308142796f98bbcaf1f1c8208aa64db65/packages/common/src/Function.ts#L298)

A [Thunk](https://evolu.dev/docs/api-reference/common/Function/type-aliases/Thunk) that returns `undefined` for void callbacks.