Why?

[nelsonic]

Before we dive into learning about Closure Compiler, we need ask ourselves the question: Why?

• Why is this useful?
• What "problem" is this solving?
• Did the users ask us to write the code using ES6 features, or is this a developer "requirement"...?
• Is there a use-case for "compiling" JS code regardless of if we are using ES2015/17 ?

[nelsonic]

I just installed Google Closure Compiler JS https://github.com/google/closure-compiler-js from NPM:

npm install google-closure-compiler-js --save-dev

And the total footprint is:

By contrast babel installs 200 Megabytes on your Machine for each project you have it as devDependency...!!

Babel takes up _20x_ more space on disk and has _40x_ the file count ... Why...?!