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Lab 3: Styles Using CSS


  • Install CSS
  • Apply CSS


Install CSS

  1. Open a new command prompt (Windows) or terminal (Mac) window.

    ! Be sure to open a new window. Leave npm start running.

  2. Run one of the following commands:


    npm install mini.css@3.0.1


    yarn add mini.css@3.0.1

    Warnings can be ignored but Errors indicate there was a problem.

  3. Verify mini.css was added as a dependency of the project in package.json.


    "name": "keeptrack",
    "version": "0.1.0",
    "private": true,
    "dependencies": {
    + "mini.css": "~3.0.1",
    "react": "^16.9.0",
    "react-dom": "^16.9.0",
    "react-scripts": "3.1.1"

Apply CSS

  1. Open and delete the contents of app.css

  2. Open the file App.js.

  3. Delete the JSX returned and replace with the HTML as shown below.


    import React from 'react';
    - import logo from './logo.svg';
    import './App.css';

    function App() {
    return (
    - <div className="App">
    - <header className="App-header">
    - <img src={logo} className="App-logo" alt="logo" />
    - <p>
    - Edit <code>src/App.js</code> and save to reload.
    - </p>
    - <a
    - className="App-link"
    - href=""
    - target="_blank"
    - rel="noopener noreferrer"
    - >
    - Learn React!!
    - </a>
    - </header>
    - </div>

    + <blockquote cite="Benjamin Franklin">
    + Tell me and I forget, teach me and I may remember, involve me and I learn.
    + </blockquote>

    export default App;
  4. Open the file src\index.css

  5. Delete the current contents of the file.

  6. Import the stylesheet you installed.


    @import '../node_modules/mini.css/dist/mini-default.min.css';

    Alternatively, you could choose a dark theme: mini-dark.min.css or a nordic theme: mini-nord.min.css

  7. Verify you see the following output in the browser


Mini.css is a minimal, responsive, style-agnostic CSS framework. Mini.css is similar to Bootstrap but lighter and requires fewer CSS classes so you can focus on learning React but still get a professional look.

You have completed Lab 3