React Project Setup

A system to compile and bundle your files should be configured before you start crafting your application. Babel will take care the compilation of ES6 to plain JavaScript and Webpack the bundling of the files.


Babel is a JavaScript compiler that can compile ES6 and JSX into plain JavaScript that the browser can understand.

You can write React components without ES6 and JSX but it is hard and not easily maintainable.

Integrating Babel with Webpack will compile your ES6/JSX components to plain JavaScript functions at building process.


Webpack is a module bundler which takes modules with dependencies and generates static asses by bundling them together based on some configuration.

At the minimum, Webpack will bundle all your JavaScript files into one file, all your CSS files into another file and link them to the HTML that you will send to the browser.

        <link rel="stylesheet" type="text/css" href="/public/app.css">
        <div id="app"></div>
        <script src="/public/app.js" />


Babel and Webpack need configuration files in order to accomplish their tasks, but most React projects have the same configuration.

create-react-app provides the configuration out of the box and generates a React project. It has the eject command that allows you to extend this configuration.


npm install -g create-react-app


  • mkdir my-app
  • cd my-app
  • create-react-app .

The generated folder structure is the following:

├── node_modules
├── package.json
├── .gitignore
├── public
│   └── favicon.ico
│   └── index.html
│   └── manifest.json
└── src
    └── App.css
    └── App.js
    └── App.test.js
    └── index.css
    └── index.js
    └── logo.svg
    └── registerServiceWorker.js

Folder Structure

For the Instagram clone example, the generated structure will be altered.

The application will be screen-based, it will display screens that render components.

├── node_modules
├── package.json
├── .gitignore
├── public
│   ├── favicon.ico
│   ├── index.html
│   └── manifest.json
└── src
    ├── components
    │    └── app
    │        ├── app.css
    │        ├── app.js
    │        ├── app.test.js
    │        └── index.js
    ├── screens
    │    └── homeScreen
    │        ├── components
    │        ├── state
    │        ├── homeScreen.css
    │        └── homeScreen.js
    ├── state
    ├── index.css
    ├── index.js
    └── registerServiceWorker.js
  • Folder components - contains all the shared components of the current level.
  • Folder screens - contains all the available screens.
  • Folder state - contains the state of the current level.
GitHub Repo


The described project structure is pretty extensible and can fit well in React world. Next, you are going to explore JSX and the rendering process of your components.

React Primer JSX and Rendering