Personal blog of Josh Comeau, a front-end software engineer. Focuses on teaching important concepts about web development and React.js, through dynamic interactions.
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Promises From The Ground Up

The “Promises” API is a surprisingly tricky part of modern JavaScript. Without the right context, it doesn’t make much sense at all! In this tutorial, you’ll build an intuition for how Promises work by getting a deeper understanding of JavaScript and its limitations. Keep reading.

Mon Jun 3, 2024 19:02
Snappy UI Optimization with useDeferredValue

useDeferredValue is one of the most underrated React hooks. It allows us to dramatically improve the performance of our applications in certain contexts. I recently used it to solve a gnarly performance problem on this blog, and in this tutorial, I'll show you how! ⚡ Keep reading.

Mon May 13, 2024 15:42
CSS in React Server Components

You can’t make an omelette without cracking a few eggs, and when the core React team unveiled their vision for the future of React, some of my favourite libraries got scrambled 😅. In this blog post, we’re going to explore the compatibility issues between React Server Components and CSS-in-JS libraries like styled-components. You’ll understand what the...

Mon Apr 15, 2024 18:55
How To Center a Div

Back in the day, centering an element was one of the trickiest things in CSS. As the language has evolved, we’ve been given lots of new tools we can use… But how do we pick the best option? When do we use Flexbox, or CSS Grid, or something else? Let's dig into it. Keep reading.

Tue Feb 13, 2024 20:33
An Interactive Guide to CSS Grid

CSS Grid is an incredibly powerful tool for building layouts on the web, but like all powerful tools, there's a significant learning curve. In this tutorial, we'll build a mental model for how CSS Grid works and how we can use it effectively. I'll share the biggest 💡 lightbulb moments I've had in my own learning journey. Keep reading. ...

Tue Nov 21, 2023 18:24
Understanding the JavaScript Modulo Operator

One of the most commonly-misunderstood operators is Modulo (%). In this tutorial, we'll unpack exactly what this little bugger does, and learn how it can help us solve practical problems. Keep reading.

Mon Sep 18, 2023 17:55

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