JavaScript

If there's one thing that never gets old, it's rock-solid JavaScript fundamentals.

When you're working in frameworks like React, Vue, and Angular, it's easy to forget that most of what you're writing is still JavaScript. We all get swept away in the excitement of new tools, but you need to lay down a stable foundation before stacking too much on top.

A strong understanding of JavaScript is essential for having a successful career, no matter which framework you use.

This is a curated resource covering the important parts of the whole language.

When someone comes to you and asks "Hey! Can you build this?", you'll be able to say "yes" with confidence.

Just starting out with JavaScript

Beginner

Learn ES6
John Lindquist
Understand JavaScript Arrays
Shane Osbourne
Advanced JavaScript Foundations
Tyler Clark

Hitting Your Stride

Intermediate

JavaScript Promises in Depth
Marius Schulz
Understand JavaScript's this Keyword in Depth
Marius Schulz
Reduce Data with Javascript Array#reduce
Mykola Bilokonsky

Above and Beyond

Advanced

Write simple asynchronous code with JavaScript generators
Max Stoiber
Asynchronous JavaScript with async/await
Marius Schulz
Understanding JavaScript's Prototypal Inheritance
Tyler Clark

devtools

Debugging

You likely know the pain and joy that is debugging. The pain is part of the process, and the joy is winning the battle and fixing the issue. You're probably familiar with the basics of using Devtools. These courses will give you new tools that will help make the journey from debugging pain to joy more quickly!

Advanced Logging with the JavaScript Console
Mykola Bilokonsky
Debug the DOM in Chrome with the Devtools Elements Panel
Mykola Bilokonsky
Debug JavaScript in Chrome with DevTool Sources
Mykola Bilokonsky
Debug HTTP with Chrome DevTools Network Panel
Mykola Bilokonsky
Critical Rendering Path
Mykola Bilokonsky
Chrome DevTools tips & tricks
Tomasz Łakomy

Mind Expanding

Deep Dive into Function Composition

This a multi-tier master course for aspiring lead developers. John Lindquist guides you from a blank JavaScript file all the way through creating a library of reusable functions, solving Callback Hell with composition, and implementing debouncing.

Composing Callbacks and Closures in JavaScript
John Lindquist

Data Fetching

Async

Under the hood of your modern applications, there is a lot of work communication back and forth with servers, reacting to user interaction, and managing the state of a complex asynchronous application. Your application grows, the complexity multiplies, until you've got a jumbled mess that makes you sad to get up and get to work every morning.