[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) › eqSameValue

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

Defined in: [packages/common/src/Eq.ts:66](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Eq.ts#L66)

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(eqSameValue(NaN, NaN));
assertFalse(eqSameValue(0, -0));
```