react-demos

This repository is a collection of small, deliberately simple example projects for learning React, the JavaScript library used to build interactive user interfaces in the browser. The maintainer's stated goal is to make each demo so straightforward that a newcomer can follow without getting lost, and to use them as a hands-on companion to the official documentation rather than as production-ready code.

The repository is organised around a series of numbered demos, each in its own folder. The README lists them in order, starting with the basics — rendering JSX (a special syntax that lets you write what looks like HTML directly inside JavaScript), mixing JavaScript expressions into JSX, and using arrays of elements — then progressively introducing core React ideas: defining a component as a class, passing data through its props, accessing nested elements via this.props.children, validating those props with PropTypes, finding a real DOM node, holding mutable data in this.state, building a form, the component lifecycle, making Ajax requests, displaying values from a Promise, and finally rendering a component on the server. Each entry quotes a short code snippet showing the key idea and links to a runnable demo page and the source file.

Someone would clone this repository to follow along step by step while learning React, or to copy a tiny working example for a concept they are stuck on. The setup is intentionally light: a single HTML template loads React, ReactDOM and a browser build of Babel so JSX can be compiled in the page itself, with no build tool required. The primary language is JavaScript and the full README is longer than what was provided here.