Large-scale applications consist of many JavaScript files and proper structuring of these files brings greater visibility. JavaScript frameworks such as AngularJS, EmberJS, and others already provide proper structuring and guidelines to define controllers, factories, and other objects, as well as provide best practices of using them. These frameworks are very popular and already adhere to the problem of higher scalability and maintainability. However, there are certain scenarios where we want to strictly rely on plain JavaScript files and may develop our own custom framework to remedy particular requirements. To acknowledge these, there are certain best industry-wide practices being used, which make our JavaScript-based frontend more maintainable and scalable.
When working on large scale applications, we need to think ahead of what the scope of the application is all about. We need to think how easily our application can be extended and how quickly the incorporation...