Javier Aguilar
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Articles with this tag

Mocking the IntersectionObserver in Jest for testing React components

Oct 22, 20233 min read37 views

The IntersectionObserver is a powerful API for tracking elements' visibility within the viewport. Many modern web applications use it to implement...

Mocking the IntersectionObserver in Jest for testing React components

How to test the Error cause with Jest and TypeScript

Feb 9, 20233 min read1.2K views

Extending Jest in TypeScript to write custom matchers for testing additional Error properties. · When developing applications, it's essential to handle...

How to test the Error cause with Jest and TypeScript

How to successfully set up a NextJS monorepo and deploy it on Vercel

Jun 11, 20225 min read1.5K views

For people that are new to monorepos like me, there are a lot of struggles that you will face and no one talks about them in the articles you can find...

How to successfully set up a NextJS monorepo and deploy it on Vercel

How to mock TypeScript interfaces with Jest

Apr 17, 20213 min read12.1K views

Last week I was creating a NodeJS + ExpressJS app in TypeScript and I was wondering how to apply the Onion Architecture successfully. In practice...

How to mock TypeScript interfaces with Jest