I think people are reading the title as “3 Foundational JavaScript Ideas You Need in Order to Upgrade Yourself to Pro Status”

Where the article is actually fine tuning these 3 JavaScript fundamentals themselves into Pro Status in order to lay a better foundation for your JavaScript knowledge or current learning.

If I’m understanding everything correctly that is :)

It’s a great article that can be beneficial for anyone who works with JavaScript. Even seasoned professionals should occasionally take a step back and re-center themselves. And beginners definitely need a solid foundation before moving on to frameworks and Node.js modules.

Something else that gets confused early on is ES5 vs. ES6. You mention maps at one point which is only available after ES6. ES5 is still used though and, in my opinion, should be learned thoroughly before progressing to ES6.

I’m definitely no JavaScript expert. I just know the issues I ran into.

Your visual diagrams and simple explanations of complex concepts are excellent though. I especially like the part about promises. That was something that was very confusing to me when I was trying to learn front-end code coming from back-end Python.

Thanks for the article!!