[shubhamjain]

I would suggest an exercise which my senior suggested. Take a look at what very successful websites use. I looked at the code of Facebook and the simplicity of their code fascinates me.

The only thing they seem to use is react, a requirejs like module system combined with an EventEmitter. I still don't understand the need of three layers of abstraction on the front-end level. I would love to be proven wrong, but that seems outright over-engineering.

[jackweirdy]

Don’t make the mistake of assuming there’s a “Right Number” of levels of abstraction. Their suitability is based on how clearly they help you interact with a system whose implementation you don’t care about.

That’s a totally human quality metric, which you can’t enumerate.