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

```ts
function eqStrict<A>(x: A, y: A): boolean;
```

Defined in: [packages/common/src/Eq.ts:59](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Eq.ts#L59)

Compares two values using SameValue equality (`Object.is`).

SameValue considers `NaN` equal to itself, distinguishes `0` from `-0`, and
compares objects by reference identity.

### Example

```ts

assertTrue(eqStrict(NaN, NaN));
assertFalse(eqStrict(0, -0));
```