// step 1: install node-sass
// using npm
npm install node-sass --save
// using yarn
yarn add node-sass
// step 2: Convert your .css files to .scss
// step 3: add in your app.js
import './App.scss';npm install node-sass --save-devnpm i node-sass@4.14.1yarn add node-sass@4.14.1npm uninstall node-sass
npm install node-sass
change the "react-scripts": "4.0.0" into "react-scripts": "4.0.3" in package.json and save
npm install
npm start
or, using yarn -
yarn remove node-sass
yarn add --dev node-sass
as above
yarn install
yarn start