# node:async_hooks

> AsyncLocalStorage, AsyncResource, and createHook, with Elide's context propagation rules.

`node:async_hooks` provides `AsyncLocalStorage`, `AsyncResource`, and `createHook`; import them from
`"node:async_hooks"`.

```js
import { AsyncLocalStorage } from "node:async_hooks";

const storage = new AsyncLocalStorage();
storage.run("request", async () => {
  await null;
  console.log(storage.getStore()); // request
  queueMicrotask(() => console.log(storage.getStore())); // undefined
});
```

## Differences from Node

- `AsyncLocalStorage` context is lost in `queueMicrotask` callbacks and `node:fs` callbacks.
- `createHook` callbacks (`init`, `before`, `after`, `destroy`) fire for timers, immediates, and Promise continuations.