Being humans, we rarely learn things linearly.

No one begins their JavaScript journey by reading the TC39 language specification line-by-line like a pedantic masochist.

Instead we all cobble together a good-enough understanding, leaving holes here and there to fill in later.

If you're like me, you might have been stumbling through your JavaScript journey without 100% grokking prototypical inheritance, or how call, apply, and bind work on functions.

It's fine. Stuff mostly works.

Until it doesn't ¯_(ツ)_/¯

At some point, it's useful to stop stumbling around and peek back at those holes.

I found Tyler Clark's egghead course on Advanced JavaScript Foundations was the perfect opportunity to strengthen my JS foundations.

While working through the course, I illustrated a set of notes to help me understand and remember all the concepts.

Primitive Types & Autoboxing

Prototypical Inheritence

The New Keyword

The .this keyword

These illustrations aren't perfectly designed to explain the concepts they're about, and instead work as shorthand notes for me.

Take a look at Tyler's course if you want to dig into the concepts more.