Three Reasons to Use Yarn in 2020 (and Beyond)

When Yarn was first released, it was a huge step forward for the JavaScript and NPM community. At the time, NPM did not support deterministic sub-dependency resolution. And Yarn was considerably faster, primarily due to the introduction of an offline cache. These days, however, the gap between Yarn and NPM is much closer. NPM 5 […]

Using Developer Authenticated Identities with Cognito Identity Pools In TypeScript

Cognito identity pools provide an easy way to enable your users to have limited access to your AWS backend. With developer authenticated identities, you can integrate Cognito into your existing authentication process. 1. Create an Identity Pool Go to the Cognito developers console and click “Manage Identity Pools,” then “Create new identity pool.” Name your […]

Achieve Project-Wide Type Checking with TypeScript and Visual Studio Code

Visual Studio is an excellent integrated development environment (IDE), but sometimes it needs a little hand-holding. Throughout my experience with VS Code, it has never delivered on project-wide type checking and linting. Rather than getting instant feedback from my IDE, I’ve had to rely on my build process as a type checker. Type errors only […]

Creating a Simple Server with Next.js

It can take a long time to get a full-stack React and Node.js app off the ground. Fortunately, with the addition of API Routes, Next.js offers a way to do that in just minutes.

Loading States in React Components Using TypeScript’s Discriminated Unions

Many web applications need to load data from servers that will be shown to users. It’s important for the UI to handle loading states while the requests are in-flight. Let’s say, for example, that we have a page that will load a user’s profile. We want to be able to show a loading message, then […]

Making Your First Game in Phaser 3 with TypeScript

I recently got a chance to use Phaser 3 and TypeScript to build Root Maker with my Ludum Dare team. It worked out great. Phaser is one of the best frameworks around for HTML5 game development, and it’s definitely worth checking out if you haven’t.

Helper Functions for Testing a PostgreSQL Database

When writing tests for a Node.js server, it’s common to test the database as well. (At least, one hopes.) Here are a few helper functions for testing a PostgreSQL database using Knex.

BLOBs with Knex and PostgreSQL

My team and I recently decided that we should store user-generated binary files in our PostgreSQL database so that a user could download them at a later time. This is different from uploading those files to something like Amazon S3 (which we’ll likely consider migrating to at some point down the road).

Discriminated Unions in GraphQL and TypeScript

Both GraphQL and TypeScript support the concept of discriminated unions (also known as tagged unions). In this post, I’ll walk through setting up an example GraphQL schema and the corresponding TypeScript types, along with writing a query to retrieve a union type.

How TypeScript Shaped our Entire Codebase for the Better

Over the last year and a half, I’ve had the pleasure of working on a web app built in TypeScript. I came to Atomic with no web development experience at all. On my first couple of projects, I spent most of my time working on small, relatively isolated pieces of functionality for various applications: a […]

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