@cathalmacdonnacha

Cathal Mac Donnacha

@cathalmacdonnachaIreland 🇮🇪Joined October 2021

Follow me on my journey as I write about tech topics I face in my everyday life as a Frontend Developer 💻

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Cathal Mac Donnacha's blogs

Everyday Frontend 🚀cathalmacdonnacha.com13 posts

Fixing Slow & Flaky Frontend Tests

After noticing a spike in failing Jest builds, I decided to investigate and found that slow and flaky tests were the main culprits. In this article, I go through some tips I discovered for making slow or flaky tests faster and more reliable. There ar...

10 min readcathalmacdonnacha.com

Sep 8, 2025

Route-based code splitting with React

Code splitting is a technique used to optimize the loading performance of web apps by breaking down the bundled JavaScript files into smaller, more manageable chunks. By loading only the required code for a specific route or page, route-based code sp...

4 min readcathalmacdonnacha.com

Aug 4, 2023

Mocking Error, Empty and Loading states with MSW

One of the less exciting things about being a Frontend Developer is having to handle error, empty and loading states. It may not be the most fun thing to do, but it's necessary in order to give your users the best experience possible. Thankfully, Moc...

7 min readcathalmacdonnacha.com

Dec 6, 2022