# `resolve-alpn`

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## API

### resolveALPN(options)

Returns an object with an `alpnProtocol` property. The `socket` property may be also present.

```js
const result = await resolveALPN({
	host: 'nghttp2.org',
	ALPNProtocols: ['h2', 'http/1.1']
});

console.log(result); // {alpnProtocol: 'h2'}
```

#### options

Same as [TLS options](https://nodejs.org/api/tls.html#tls_tls_connect_options_callback).

##### options.resolveSocket

By default, the socket gets destroyed and the promise resolves.<br>
If you set this to true, it will return the socket in a `socket` property.

```js
const result = await resolveALPN({
	host: 'nghttp2.org',
	ALPNProtocols: ['h2', 'http/1.1'],
	resolveSocket: true
});

console.log(result); // {alpnProtocol: 'h2', socket: tls.TLSSocket}

// Remember to close the socket!
result.socket.end();
```

## License

MIT