React 18 was released recently. You might have already updated your project or are planning to update soon. If your project uses React with TypeScript, here are a few breaking changes in type definiti...

An acquaintance who works at Facebook, which we should now call Meta, visited Korea on vacation. We met up for drinks after a long time. Since it had been a while, we talked about many things. As the...

Recently, I've been spending my weekends creating a simple game for my child using React. My child was so engrossed in a game called "Infinite Stairs" that I decided to create a version that retains t...

Recently, during a code review, a discussion arose about the use of undefined. Personally, for a very long time, I had quite clearly distinguished between null and undefined and used them according to...

A few months ago, the final specification for ECMAScript 2021 was released. Some features are immediately usable, while others allow for deeper utilization of the language. It's good to see these chan...