# Quickstart — HTML / plain JavaScript Minimal integration: one ` ``` Open the page over HTTPS on iPhone, tap the button, pick the monitor in the chooser sheet, and values stream into the `

` block.

## 2. npm install alternative

Prefer a real module graph? Install the core package:

```bash
npm install @ios-web-bluetooth/core
```

```js
import '@ios-web-bluetooth/core/auto';

const device = await navigator.bluetooth.requestDevice({
  filters: [{ services: ['heart_rate'] }]
});
```

Importing the package side-effect mounts `navigator.bluetooth` and `window.webbleIOS`.

## What just happened

- `@ios-web-bluetooth/core` detected the WebBLE Safari Web Extension and installed the W3C polyfill at `navigator.bluetooth`.
- `requestDevice` opened the system chooser sheet — the extension is the only code allowed to drive it.
- GATT read/write/notify traffic flows through the extension to CoreBluetooth and back, fully off the main thread.

## Next

- [API reference](api-reference.md)
- [Recipes](recipes.md)
- [Troubleshooting: extension not detected](troubleshooting/extension-not-detected.md)