将sass加载器添加到已在使用react的webpack

npm init -y

npm install webpack webpack-cli sass-loader node-sass --save-dev

const path = require('path');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: [
          'style-loader',
          'css-loader',
          'sass-loader',
        ],
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
          },
        },
      },
    ],
  },
};

import React from 'react';
import './styles.scss';

const MyComponent = () => {
  return (
    <div className="my-component">
      {/* Your component content */}
    </div>
  );
};

export default MyComponent;

npx webpack