useEffect is a hook added in React 16.8. It allows you to perform side effects in function components. This means you can update things outside of React based on your props and state. Fetching data when the component state changes, changing the page <title> or connecting to a WebSocket server are all examples of side effects that can be done with useEffect.

In this article I'll show you how to implement dark mode in your blog or site using CSS variables and how the toggle it automatically based on the users preferred color scheme.

There's a few ways to loop over a object in JavaScript. Let's look at a couple of them. Let's say we have a object like this

Hooks are an React API that were introduced in React 16.8 a little more than a year ago (february 2019). They let you use state in your React components without writing classes.

Memoization is a optimization technique frequently used in functional programming. It means storing the result of a computationally intensive function call and returing the cached result when the function is called with the same arguments.

Confusing class variables and instance variables in Python is a pretty common mistake. Or.. atleast I've made it more than once. Python doesn't use static keyword but instead the location the variables are defined in to differentiate between the two which will seem pretty foreign to people coming from other object oriented languages.