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#typescript
Posts tagged #typescript
Mocking the IntersectionObserver in Jest for testing React components
The IntersectionObserver is a powerful API for tracking elements' visibility within the viewport. Many modern web applications use it to implement lazy loading, infinite scrolling, or other interactions that depend on an element's visibility. When it...
How to test the Error cause with Jest and TypeScript
Extending Jest in TypeScript to write custom matchers for testing additional Error properties.
How to successfully set up a NextJS monorepo and deploy it on Vercel
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 out there, especially when it comes to monorepos with NextJS apps. Setup a monorepo with NPM or Yar...
How to mock TypeScript interfaces with Jest
Last week I was creating a NodeJS + ExpressJS app in TypeScript and I was wondering how to apply the Onion Architecture successfully. In practice that was not a problem (I will write an article about it soon) until the moment of testing. There is li...
