---
url: /reference/sjs.md
---

# @signaldb/sjs

## sjsReactivityAdapter (`default`)

```js
import { Collection } from '@signaldb/core'
import sjsReactivityAdapter from '@signaldb/sjs'
import S from 's-js'

const posts = new Collection({
  reactivity: sjsReactivityAdapter,
})

S(() => {
  console.log(posts.find({ author: 'John' }).count())
})
```

Reactivity adapter for usage with [S.js](https://github.com/adamhaile/S).

The API of S.js doesn't allow [reactive scope checking](/reactivity/#reactivity-libraries).
You must manually disable reactivity when making calls outside a reactive scope to avoid memory leaks. You can do this by passing `{ reactive: false }` to your options (e.g. `<collection>.find({ ... }, { reactive: false })`).