@pexip/signal/api-docs/type-aliases/Detach.mdx

an observer pattern while avoiding boilerplate code. https://en.wikipedia.org/wiki/Signals_and_slots

```ts
type Detach = () => void;
```

A detach function to remove its observer from the Signal construct when it is
called.

## Returns

`void`

## Example

```typescript
interface Message {
  type: string;
  payload: any;
}
const messageSignal = createSignal<Message>();

const messageHandler = (message: Message) => {
  logger.info({message});
};

const detachMessageSignal = connectedSignal.add(messageHandler);

// Wire the signal to WebSocket onMessage
ws.onmessage((message) => {
  messageSignal.emit(message);
});

// Later there is no need to listen the message event, or the context is
about to be abandoned
// Call the detach function to remove the listener from messageSignal
detachMessageSignal();

```