This article covers the Facade pattern in NgRx. The reader must have a basic understanding of NgRx or a similar state management library. The Facade pattern decouples NgRx from the rest of our application. It does that by masking NgRx-actions as method calls and the selectors as properties of type…

A guide to common patterns to boost your project’s type safety — This article shows common patterns to maximize TypeScript’s potential for type-safe code. These techniques are part of the same group, which we call type narrowing. The source code is available on GitHub. A video version of this article is available on: Introduction Whenever we deal with a variable of multiple…

A look at “Optional NgModules” — One of the upcoming features in the Angular framework will be “Standalone Components” (SC) or “Optional NgModules”. It will remove the necessity for NgModules. There are many blog posts, articles, etc. about SC. …

Write robust E2E tests — On 24th April, Angular announced the deprecation of their E2E testing tool protractor. It was unclear if there will be a successor or if Angular is delegating this to the users themselves. At the time of this writing, WebDriver.IO, TestCafé, and Cypress have provided schematics for the Angular CLI. This…

The landscape of E2E frameworks is changing — On 24th April, Angular announced the deprecation of their end-to-end (E2E) testing tool, Protractor. It remains unclear whether there will be a successor or if Angular will delegate this to its users. At the time of this writing, WebDriver.IO, …

Web Components do not deliver on their promises. I wrote this essay for Angular developers who are evaluating web components or are wondering what went wrong with the web components they already use. …

This article is for students of JavaScript that don’t have any prior knowledge in object-oriented programming (OOP). I focus on the parts of OOP that are only relevant for JavaScript and not OOP in general. I skip polymorphism because it fits better with a static-typed language. Why do you need to know this? Have you picked JavaScript…

This article is also available in Spanish. In this article, I want to explain what a software developer, who uses JavaScript to write applications, should know about engines so that the written code executes properly. You’ll see below a one-liner function that returns the property lastName of the passed argument…

I have been programming for more than 20 years. During that time, I’ve had the pleasure to work with many people, from whom I learned a lot. …