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React

Official tag for Facebook's React JavaScript library for building user interfaces

about #react

React is a declarative, component-based library, you can learn once, and write anywhere

Editor Guide

Check out this Editor Guide
or this post to learn how to add code syntax highlights, embed CodeSandbox/Codepen, etc

Official Documentations & Source

Improving Your Chances for a Reply

by putting a minimal example to either JSFiddle, Code Sandbox, or StackBlitz. Describe what you want it to do, and things you've tried. Don't just post big blocks of code!

Where else to ask questions

StackOverflow tagged with [reactjs] Beginner's Thread / Easy Questions (Jan 2020) on r/reactjs subreddit.

Note: a new "Beginner's Thread" created as sticky post on the first day of each month

Learn in Public

Don't afraid to post an article or being wrong.
Learn in public.

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Dec 22 '25

Conditional Rendering in React: A Practical Guide for Beginners

#react #webdev #beginners #programming

4 min read

Jan 27

Fix 'Objects are not valid as a React child' Error (2026)

#react #reactnative #webdev #programming

5 min read

Joshua

Dec 23 '25

Why static diagrams fail: simulating an e-commerce checkout flow in Robust Design

#systemdesign #react #webdev #programming

2 min read

Jan 26

Master React Testing Step-by-Step: Jest, Vitest & React Testing Library

#react #javascript #nextjs

10 min read

Jan 24

React Render vs Commit: What Actually Happens (DOM vs React Native)

#react #reactnative #programming

4 min read

Jan 26

React.js vs Next.js: What to Choose, When, and Why?

#webdev #react #learning #nextjs

3 min read

Dec 27 '25

💎 Conhecem o useImmer ?

#useimmer #react

1 min read

Tiago

Jan 26

Why Does React Use a Virtual DOM?

#react #dom #vdom #javascript

6 min read

Jan 16

Code-ing in a Tree: Adding Auto-Save to freeCodeCamp

#opensource #react #javascript #webdev

3 min read

Abhishek Arankal

Jan 15

Todo App

#showdev #beginners #javascript #react

8 min read

Dec 22 '25

Build a Lightweight Testimonials Slider in React (Beginner Friendly)

#react #performance #tutorial #beginners

3 min read

Adan Ali

Dec 22 '25

Building an Offline-First POS SaaS Entirely with AI Including Desktop, Mobile Apps, and Landing Page

#ai #react #electron #sass

2 min read

Soumil Mukhopadhyay

Dec 21 '25

ScholarBridge

#postgres #react #node #express

2 min read

Voke

Jan 26

Building in Public: AI CV Analyzer MERN App - Act 4 · Scene 2 : Stabilizing the Frontend Contract

#buildinginpublic #react #webdev #devjourney

3 min read

Dec 21 '25

How to Use map() in React (With Simple Examples)

#webdev #programming #javascript #react

4 min read

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