When my latest book, Mastodon For Dummies, was released, several people on social media commented that it was “probably written by AI.” These comments infuriated me much more than a bad review ever has. Bad reviews often contain information that can…

Keeping up with JavaScript libraries is a full-time job. Even if you pick one to specialize in, the constant stream of changes made to it is going to make you feel like you’re always behind the times. On top of this, people who write about JavaScript…

It’s the topic du jour, and since I was the person who predicted the path we’re now on, I’ve been getting some requests for my thoughts about OpenAI’s ChatGPT, which is currently busy cranking out thousands of poorly-written articles about itself for…

Chapter 12 covers how to do Routing in React using React Router v5. In the time since the book came out, React Router v6 has been released, which includes some pretty big breaking changes. All the code in the book still works, as long as you use…

The final code example in the Shallow Copies and the Spread Operator section on page 160 shows a rest parameter with only two periods. There should be three. The correct code is: function add(...numbers){ return numbers.reduce(sum,next) => sum +…

The biggest change in React 18 is the addition of concurrent rendering. With concurrent rendering, you can mark state updates as non-urgent in order to improve the performance of your user interface. Concurrent rendering is opt-in. What this means is…

In listings 4-12 and 4-13, the button’s onClick calls this.incrementCount and passed count+1 to it. There’s no need to pass a value here, since the incrementCount function increments the count variable. The corrected / improved code for listing 4-12…

The latest version of React has been a long time coming. This new version has some great behind-the-scenes updates to how React rendering works, makes changes to server-side rendering of React, and introduces the new Suspense feature, which lets you…

Errors can happen in React components for many reasons. In development mode, errors will cause React to spit up a bunch of red text into the browser. This is sometimes helpful for debugging the problem. In production mode, React will display a white…

Prop drilling is a normal pattern and best practice in React. There are times, however, when ‘global’ data, such as user preferences or theming information must be passed to many different component and through multiple layers. Read More