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

```ts
function assertNotDisposed(value: DisposableStack | AsyncDisposableStack): void;
```

Defined in: [packages/common/src/Assert.ts:155](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Assert.ts#L155)

Guards synchronous methods on objects that may be called after disposal.

Use when an API must fail fast before touching already-disposed state.

### Example

```ts
const stack = new globalThis.AsyncDisposableStack();
assertNotDisposed(stack); // no-op
await stack.disposeAsync();
assertNotDisposed(stack); // throws Error
```