function handleUnsubscribe()

in src/MQTTDisplay.js [228:240]

• 6 lines of code
• 1 McCabe index (conditional complexity)

  function handleUnsubscribe(e) {
    // stop submit button from refreshing entire page
    e.preventDefault();

    // end subscription; I think this could be added to the return() of the useEffect(), as an "onUnmount" handler,
    // but I received an erropr when I tried it. I might be doing something wrong but for now, it works with the commands
    // below... 
    mqttClient.end(false); 
    setIsConnected(false);

    // remove subscription from parent component, thus killing this component...
    props.removeSubscription(props.topic);
  }