node.js - npm install 成功，但 npm run start 无法找到 rimraf 和 react-scripts，尽管它们已安装

Question

运行 Windows 10(内部版本 18362)，使用 Node.js v10.16.0、npm v6.9.0 和 .Net Core v2.2.300。我通过"file"->“新建项目”在 Visual Studio 2017 中创建了一个示例 React/Redux 应用程序，选择 ASP.NET Core Web 应用程序，然后选择 React.js 和 Redux。但是，当通过 Visual Studio 启动应用程序时，浏览器遇到 500 错误并显示:

An unhandled exception occurred while processing the request.
AggregateException: One or more errors occurred. (One or more errors occurred. (The NPM script 'start' exited without indicating that the create-react-app server was listening for requests. The error output was: 'rimraf' is not recognized as an internal or external command,

operable program or batch file.
npm ERR! code ELIFECYCLE

npm ERR! errno 1
npm ERR! WebApplication1@0.1.0 start: `rimraf ./build && react-scripts start`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the WebApplication1@0.1.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

首先，我卸载并重新安装了node和npm，删除了node_modules并重新运行了npm install。我在重新安装 Node 之前和之后重新启动。

我知道 rimraf 安装在本地 .\node_modules 目录中，因为我可以成功运行 .\node_modules\.bin\rimraf。如果我运行 .\node_modules\.bin\react-scripts start，react-scripts start 会成功启动应用程序的 React 部分，但是为什么 npm 找不到这个？

据我了解，npm 在脚本执行时将本地 node_modules\.bin 添加到 PATH 中，但它仍然无法找到 rimraf 和 react-scripts 尽管如果提供 shell 的绝对路径，则可以访问它们。

我还尝试将 .\node_modules\.bin 添加到我的系统路径中，这允许我(假设我位于应用程序目录的根目录中)只运行 react-脚本启动并加载应用程序，但npm run start仍然失败。

这是我的 package.json:

{
  "name": "WebApplication1",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "bootstrap": "^4.3.1",
    "jquery": "3.3.1",
    "react": "^16.0.0",
    "react-dom": "^16.0.0",
    "react-redux": "^5.0.6",
    "react-router-bootstrap": "^0.24.4",
    "react-router-dom": "^4.2.2",
    "react-router-redux": "^5.0.0-alpha.8",
    "react-scripts": "^1.1.5",
    "reactstrap": "^6.3.0",
    "redux": "^3.7.2",
    "redux-thunk": "^2.2.0",
    "rimraf": "^2.6.2"
  },
  "devDependencies": {
    "ajv": "^6.0.0",
    "babel-eslint": "^7.2.3",
    "cross-env": "^5.2.0",
    "eslint": "^4.1.1",
    "eslint-config-react-app": "^2.1.0",
    "eslint-plugin-flowtype": "^2.50.3",  
    "eslint-plugin-import": "^2.14.0",
    "eslint-plugin-jsx-a11y": "^5.1.1",
    "eslint-plugin-react": "^7.11.1"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "scripts": {
    "start": "rimraf ./build && react-scripts start",
    "build": "react-scripts build",
    "test": "cross-env CI=true react-scripts test --env=jsdom",
    "eject": "react-scripts eject",
    "lint": "eslint ./src/"
  }
}

Answer 1

遇到了同样的问题，请选择调试选项 [您的应用程序的名称]，而不是调试选项 IIS Express。