title: Examples of UI heavy Object Oriented Javascript apps
body: <p>I'm fairly new developer who's been using Javascript in procedural way for nearly a year. In the company I'm working, we develop UI rich web apps with lots of interactions (dropdowns, sliders, modals, animations). I've noticed, that when project gets bigger it turns out to unmaintainable mess.</p>
  
  <p>I've come to conclusion that it would be great to start developing apps in object oriented way, but I cannot find any good tutorials on how to do it. All I can find is some basic examples with Cat extending Animal object and so on.</p>
  
  <p>I'd like to ask you for some github links to open source projects with lots of UI elements which uses Object Oriented Javascript. That way I can get a grasp of how it's supposed to be done correctly. Also it would be ideal, if it was pre ES6 as our projects are written in ES5.</p>
  
  <p>Thanks in advance</p>