This post is designed to be read after you read JavaScript Inheritance and the Prototype Chain. If you’d prefer to watch rather than read, Previously we looked at how to accomplish inheritance in JavaScript using both ES5 and ES6. In our example, we abstracted the common features amongst every…

I’ve taught JavaScript for a long time to a lot of people. Consistently the most commonly under-learned aspect of the language is the module system. There’s good reason for that. Modules in JavaScript have a strange and erratic history. …

Because React Router is just components, you can do crazy things like having recursive routes. In this post we’ll learn how they work by breaking down the ‘Recursive Paths’ example on the React Router docs. Recursive routes aren’t the most pragmatic thing in the world, but they really show…

Often times when building an app with React Router you’ll need to pass props through a Link component to the new route. In this post, we’ll break down how that process works. There are two different ways to pass data from a Link component through to the new route…

In this post you’ll learn two new ways to create variables in JavaScript (ES6), let and const. Along the way we’ll look at the differences between var, let, and const as well as cover topics like function vs block scope, variable hoisting, and immutability. If you prefer to watch a…

When building an app with React Router, often you’ll want to implement a sidebar or breadcrumb navbar. In this post you’ll learn how that’s done with React Router by breaking down the Sidebar example from the React Router documentation. A common UI pattern is to have a sidebar or…

This post is designed to be read after you read JavaScript Private and Public Class Fields. If you prefer to watch a video instead, Previously we learned how to create an Animal class both in ES5 as well as in ES6. We also learned how to share methods across…

Email validation is hard. With the vast amount of complex, but valid email addresses that exist today, the only way to truly tell if an email address is valid is to send the email and see if it bounces. With that said, there are a few things we can do…

Note: This is part of my Advanced JavaScript course. If you enjoy this post, check it out. One of my favorite sites is BerkshireHathaway.com — it’s simple, effective, and has been doing its job well since it launched in 1997. …