If you are new to React, most likely you want to know how to display a list of items in React's JSX syntax. This tutorial for List components in React gives you a step by step walkthrough on how to render a list of simple primitives, how to render a list of complex objects, and how to update the state of your list in React. How to display a list of…
There are quite a lot of articles about React out there speaking about controlled and uncontrolled components without explaining them. It has been quite similar for my articles, whereas I always tried to add at least one or two sentences explaining them, but in the end, I thought it would be great to have a brief tutorial just showing a simple…
Everyone dealing with React knows about this warning: Warning: Each child in a list should have a unique "key" prop. It shows up in your development tools of your browser and it's one of the warnings you encounter very early in your React career. The following list component results in this warning: The warning says we only need to add a key…
If you haven't used state management excessively in React Function Components , this tutorial may help you to get a better understanding of how React Hooks -- such as useState, useReducer, and useContext -- can be used in combination for impressive state management in React applications. In this tutorial, we will almost reach the point where…
So much has been said about the appropriate way to style modern web apps. There's the general and oldest method of styling at document level - creating a style.css file and linking to it in the HTML file and more recently the method of styling in JS. This is popularly known as CSS-in-JS. CSS-in-JS is a styling approach that abstracts the CSS…
React Hooks were introduced to React to make state and side-effects available in React Function Components. Before it was only possible to have these in React Class Components; but since React's way of implementing Components has changed over the years , we have the class component's features available with React Hooks in React Function Components…
The Map Function is one of the many Methods existing on the JavaScript Array prototype . If you want to do a deep dive on prototypical inheritance, here's a great read by Kyle Simpson on how prototypes work under the hood . For this article it will be sufficient to know that the methods on the Array prototype are available to every array that…
So far, it was fine to rely only on React's local state and React's Context API. This tutorial dives into using MobX on top of React and Firebase for the state management. We'll exchange React's local state (e.g. users on admin page, messages on home page) and React's context (e.g. session management for authenticated user) with MobX. It will how…
The previous tutorial series covered a lot of ground for Firebase in React. So far, it was fine to rely only on React's local state and React's Context API. This tutorial dives into using Redux on top of React and Firebase for state management. You will exchange React's local state (e.g. users on admin page, messages on home page) and React's…
There are various advanced concepts and patterns in React to master on becoming a React developer. In this tutorial, I want to go through React's Component Composition step by step by evolving one example around this React pattern. You can find more about the topic in the official React documentation as well. Composition in JavaScript Let's take…
