How ReactJs Works : Simple Guide

React is an open-source JavaScript library created by Facebook for building user interfaces. It allows us to create complex, interactive and stateful web applications using components.

Some key features of React include:

? Composable components

? Declarative code using JSX

? Virtual DOM for optimized performance

? Unidirectional data flow

? Easy state management

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React helps us build modern web apps much faster and easier than just using vanilla JS.

ReactJS vs "Vanilla JavaScript": Why Use React?

Compared to regular JavaScript, React gives us:

? Components - reusable building blocks

? JSX - markup syntax for UIs

? Virtual DOM - a performance optimization

? State management - track state changes

? Easier bindings - less wiring code

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So React provides abstraction on top of vanilla JS to help structure and build UIs faster and easier.

Editing Our First React App

Let's dive in and edit our first React app!

We'll be starting with a simple React code sandbox. It includes:

? Some starting code

? The ability to edit and save

? Instant preview of changes

This allows us to learn React hands-on right away.

Creating React Projects: Browser-based vs Local Development

There are two main paths for creating React projects:

1. In-browser coding environments like

CodeSandbox

2. Local development on your machine

We'll cover both, starting with an online editor for the fastest setup.

Creating React Projects Locally

Later, we'll get React set up locally. This involves:

? Installing Node.js

? Using NPM to initialize projects

? Running a local dev server

? Editing code in our text editor

Local development unlocks full control, custom configuration, debugging, etc.

And there's our introduction section! Let me know if you would like me to expand on any topic or add any other content here.