title: Why use MQTT Node.JS library?
body: <p>I am currently building a web app using the Paho MQTT Javascript library, and I was wondering in what case should I use the MQTT.JS library ?
  Could you give me examples when I cannot use the Javascript library and need to use the MQTT.js library (which I think is made for Node.js) ? </p>
  
  <p>(I know the two things are completely different but still, they both concern web applications!)</p>
  
  <p>Thank you !</p>