typescript

A Simple Approach to Complicated Database Defaults

Database tables rarely stay the same over the course of a project. We often need to add tables, add or rename columns, or break up a table to support evolving project demands or updated domain modeling. Migrating existing data correctly is not always trivial. Here are two scenarios I ran into recently on a project […]

Getting Create React App & Express to Share Code Without Ejecting (Using Webpack & Typescript)

On a recent project, we used Create React App (CRA) as a starting point. It provides a lot of features out of the box that make starting a new React project a breeze, and it has a community-driven update path. I also wanted to share Typescript code between the front end and back end, something […]

Scrollable Grid with Just-in-Time Data Loading – Part 4: Fetching Data with Apollo Client and GraphQL

Today I’ll explain how to use Apollo Client to fetch data in batches from a GraphQL endpoint and hook that data up to Infinite Loader. By the end of this post, you’ll have an (almost!) full-stack, just-in-time loading list. How did we get here? In my last few posts, I’ve explained how to: Fetch data […]

Better TypeScript Types for Redux Saga’s “Call” Effect

One of the challenges of working with Redux Saga in TypeScript is the heavy and unconventional use of generator functions. This feature from JavaScript does some amazing heavy lifting in enabling the library to be as powerful as it is, but it just doesn’t play well with TypeScript’s capabilities. There’s currently no way to even […]

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 […]