React提供的脚手架creact-react-app创建的工程文件不像vue那种暴露出webpack来，所以添加依赖需要拐个弯。
为了配置sass需要按以下步骤进行:
npm install sass-loader node-sass --save-dev
node_modules/react-scripts/config/webpack.config.js
找到module下的rules，oneof数组中，然后找到最后一个配置，修改成如下的样子
{
loader: require.resolve(‘file-loader‘),
// Exclude `js` files to keep "css" loader working as it injects
// its runtime that would otherwise be processed through "file" loader.
// Also exclude `html` and `json` extensions so they get processed
// by webpacks internal loaders.
exclude: [/\.(js|mjs|jsx|ts|tsx)$/, /\.html$/, /\.json$/],
options: {
name: ‘static/media/[name].[hash:8].[ext]‘,
},
},
// ** STOP ** Are you adding a new loader?
// Make sure to add the new loader(s) before the "file" loader.
{
test:/\.scss$/,
loaders: [‘style-loader‘, ‘css-loader‘, ‘sass-loader‘]
}
原文：https://www.cnblogs.com/wind-wang/p/11912080.html