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

```ts
type Simplify<T> = Kysely.Simplify<T>;
```

Defined in: [packages/common/src/Types.ts:203](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Types.ts#L203)

Simplify an intersection type into a single mapped type.

This utility forces TypeScript to "flatten" an intersection type into a
single object type so that tooltips and error messages are easier to read.

### Example

```ts
type A = { a: string } & { b: number };
// Without Simplify, TypeScript may display A as:
// { a: string } & { b: number }

type B = Simplify<A>;
// B is equivalent to:
// { a: string; b: number }
```