Here are some sweet Black Friday Deals. Wes Bos Wes Bos creates high-quality courses about JavaScript and React. Now all of those courses are on sale. I bought the FullStack Advanced React & GraphQL course. Wes glosses over some concepts, but overall the quality is quite high, and the course was well worth the money. Find an overview over all courses at wesbos.com/courses. Talk Python The Mega-Bundle Deal is $50 off: $149 for the whole course catalog.

Here are some useful links for you: Colors And Fonts: a curated library for front-end developers and designers RxJS with React Hooks for state management: a beginner-friendly tutorial Barebones AWS Amplify + React + GraphQL App: get started quickly with this tutorial Building a payments system with React and Stripe: this tutorial shows you how to use Stripe in your React.js application React, Redux and JavaScript architecture: a post from 2018 that's still helpful in understanding the basic concept of Reat.

Today I finished my first TypeScript experiment with React. Here are some thoughts after using ReasonReact first, and now TypeScript second. Setup Is Not Better Than ReasonReact I used Create React App to bootstrap the app. npx create-react-app <project-name> –typescript But then I had to setup ESLint and Prettier with TypeScript. ReasonML & BuckleScript: npm install -g bs-platform bsb -init <project-name> -theme react-hooks After that you're done. It's JavaScript

A few days ago I started preparing for my first tech talk. One of the common questions about ReasonML and ReasonReact is: Why not TypeScript? If you're looking for a statically typed alternative for JavaScript, TypeScript seems like the obvious choice. I did a TypeScript workshop with FrontEnd Masters (online) a while ago, but I have to admit that I didn't use TypeScript in practice. The last few days I started creating a simple TypeScript React app.

Raise your hand ✋, if you've seen this error in your React application: Warning: Can't call setState (or forceUpdate) on an unmounted component. This is a no-op, but it indicates a memory leak in your application. To fix, cancel all subscriptions and asynchronous tasks in the componentWillUnmount method. The Problem This error often happens when you make an asynchronous request for data, but the component unmounts. For example, some logic in your app tells React to navigate away from the component.

I wrote about my Gatsby build time woes yesterday. Unfortunately, Netlify and Gatsby rebuild my site completely with every update. I use the gatsby-plugin-netlify-cache but build times are still high. While searching for ways to optimize my Netlify build I stumbled upon an issue on the Gatsby repository. The issue was merged into master and published to gatsby@2.17.0. Before: At the moment this hash changes if anything within ./src has changed between builds.

When I started the blog, I wanted a quick solution that simply works. That's why I'm using a Gatsby Starter. I didn't want to fiddle around with my blog too much. I chose Gatsby because it's build with JavaScript and React.js. There are other candidates like Hugo, but I'm not familiar with the programming language it's built with (Golang). Gatsby offers great features out of the box, and it was easy to deploy to Netlify.

I'm a big fan of Dave Ceddia's blog for bite-sized overviews of React Hooks. For example, the articles A Simple Intro to React Hooks or How the useContext Hook Works are excellent short introductions to a complex topic. Yesterday, I found this gem: Thinking in React Hooks The article compares class-based React components to React hooks in a concise, and visually appealing way. I recommend checking out the article, even if you're already familiar with React hooks.

A few weeks ago, I started learning ReasonML and ReasonReact. After doing a basic tutorial, I decided to tackle a form with validation. Building a simple form is not too hard, but it offers some interesting challenges. Some examples include getting user input and storing it locally, adding validation logic, and displaying the validation messages. Thus Reason Form was born. It takes inspiration from James King's Using Custom React Hooks to Simplify Forms and a (deprecated) course about TDD with React, Flask, and Docker.