相关疑难解决方法(0)

我创建了一个空白的 React 项目，使用命令：npx create-react-appon npm v7.0.7 和 Node v15.0.1

安装：

• 反应 v17.0.1,
• 节点sass v5.0.0，

然后我尝试将空白的 .scss 文件导入 App 组件：

应用程序.js

import './App.scss'

function App() {
  return (
    <div className="App">
      App
    </div>
  );
}

export default App;

抛出错误：

Failed to compile.

./src/App.scss (./node_modules/css-loader/dist/cjs.js??ref--5-oneOf-6-1!./node_modules/postcss-loader/src??postcss!./node_modules/resolve-url-loader??ref--5-oneOf-6-3!./node_modules/s
ass-loader/dist/cjs.js??ref--5-oneOf-6-4!./src/App.scss)
Error: Node Sass version 5.0.0 is incompatible with ^4.0.0.

包.json

{
  "name": "react-17-node-sass-5",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.11.5",
    "@testing-library/react": "^11.1.0",
    "@testing-library/user-event": "^12.1.10",
    "node-sass": "^5.0.0",
    "react": "^17.0.1",
    "react-dom": "^17.0.1",
    "react-scripts": "4.0.0",
    "web-vitals": "^0.2.4" …

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 …