Leonardo Maldonado

Leonardo is a full-stack developer, working with everything React-related, and loves to write about React and GraphQL to help developers. He also created the 33 JavaScript Concepts.

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Zero-Runtime CSS with Vanilla Extract

CSS can improve performance and UX of an application. Vanilla Extract is an alternative to CSS-in-JS that allows writing zero-runtime CSS using TypeScript or JavaScript.

by Leonardo Maldonado
June 30, 2023 Share
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All You Need to Know About CORS & CORS Errors

Do you understand CORS and why you get CORS errors? Let’s understand the basics behind this security practice and one of the most common errors you’ll see.

by Leonardo Maldonado
June 23, 2023 Share
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Modern APIs With Fastify in Node.js

Is Fasitify the best option for making a modern Node.js API? Let’s take a look.

by Leonardo Maldonado
December 29, 2022 Share
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Introduction to Rust for JavaScript Developers

Rust is in its sixth year of being the most popular programming language. Let’s learn why!

by Leonardo Maldonado
December 21, 2022 Share
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Beginner’s Guide to Environment Variables

Environment variables allow us to keep values on our local and production environments distinct and safe as we develop our app.

by Leonardo Maldonado
December 08, 2022 Share