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luistak/windowed-mf1.js

Created January 27, 2021 15:45
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windowed-mf1.js
import { Observable } from 'windowed-observable';
const observable = new Observable('messages');
function App() {
const [messages, setMessages] = useState([]);
const handleNewMessage = (newMessage) => {
setMessages((currentMessages) => currentMessages.concat(newMessage));
};
useEffect(() => {
observable.subscribe(handleNewMessage);
return () => {
observable.unsubscribe(handleNewMessage)
}
}, [handleNewMessage]);
...
}
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