小编par*_*ial的帖子

刚接触 webpack。试图让 sass-loader 与我的 React 项目一起玩得很好，已经遵循教程。配置似乎正确，但结果总是“无法解析 'sass-loader'”。

我怀疑这是一些非常明显的错误，但我还没有进行多少搜索或谷歌搜索。任何帮助表示赞赏。

错误

ERROR in ./ui/index.js
Module not found: Error: Can't resolve 'sass-loader' in '/root/src'
 @ ./ui/index.js 19:0-33
 @ multi webpack-hot-middleware/client?reload=true babel-polyfill ./ui/index.js

到目前为止我所做的（在所说的预先存在的反应项目上）：

npm i --save-dev node-sass sass-loader

package.json，在 devDependencies 下

"node-sass": "^4.7.2",
"sass-loader": "^6.0.6",
"webpack": "~2.2.1",
"webpack-dev-middleware": "~1.12.0",
"webpack-hot-middleware": "~2.20.0",
"webpack-node-externals": "~1.6.0"

索引.js

import React from 'react';
import ReactDOM from 'react-dom';
import { HashRouter } from 'react-router-dom';
import App from './src/App';

require('./src/styles/main.scss');

ReactDOM.render(<HashRouter><App /></HashRouter>, 
document.getElementById('root'));

webpack.config.react.js：

const path = require('path');
const webpack …