Resources, tutorials, articles about JavaScript, Node.js, Deno, TypeScript, React, Jest, Enzyme and other JavaScript-based front and back end technologies.
While working recently on an NPM library built with Rollout, I noticed that the folder structure changed, and some TypeScript definition files, the .d.ts ones, weren't in the final build where they were supposed to be. After fixing this, I created an integrity checker that ensured that all TypeScript definition files were there they should… Continue reading How to ensure that TypeScript definition files are in the final build
Micro frontends are an architecture inspired by microservices proposing that web apps can be build and thought of as a composition of smaller apps, each one specialized in a certain feature and owned by a team that focuses in the feature offered. Since they're independent apps, this also means that they can be built using… Continue reading How micro frontends can make or break app development
Learn how to suppress the output of undesired console.log() calls in your Jest tests.
When you use the utility Partial on a type, it will make all the type properties optional. Let's see how we can compose this utility with another one, Omit, to make optional only certain properties of this type. We'll finally create a utility type using TypeScript generics to apply this on any type we want.… Continue reading TypeScript: make selected properties optional with Partial & Omit
Bidirectional maps allow you to query by key and get its value or by value and get its key. Learn how to implement them in JS and make them type safe with TypeScript.
Learn how to create a Firebase login and sign up system in React using hooks.
Learn how to create a Rust library of functions, compile it into WebAssembly, and run it on the Deno JavaScript runtime.
I spoke at the JavaScript for WP conference about writing tests for the JavaScript in our WordPress plugins. Talk was live online on July 10, 2020. The code and the slides can be found here.
In this Deno tutorial, we'll see how to create a Deno CLI tool with TypeScript. We'll explore how to read a directory and write a file. Finally, we'll learn to publish our Deno module to GitHub and run it directly from that location and also to install it locally so it can work without connection.
Angular 10 introduces new support for TypeScript 3.9, new TS libraries and project structure, plus a stricter mode.
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