Question

我安装了所有必需的软件包并尝试运行npm start脚本，这给了我以下错误：

TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
    at validateString (internal/validators.js:118:11)
    at Object.join (path.js:375:7)
    at noopServiceWorkerMiddleware (C:\Alex\Practise\React website\front-end\node_modules\react-dev-utils\noopServiceWorkerMiddleware.js:14:26)
    at Layer.handle [as handle_request] (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\layer.js:95:5)
    at trim_prefix (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\index.js:317:13)
    at C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\index.js:284:7
    at Function.process_params (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\index.js:335:12)
    at next (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\index.js:275:10)
    at launchEditorMiddleware (C:\Alex\Practise\React website\front-end\node_modules\react-dev-utils\errorOverlayMiddleware.js:20:7)
    at Layer.handle [as handle_request] (C:\Alex\Practise\React website\front-end\node_modules\express\lib\router\layer.js:95:5)

这是我的package.json的副本：

{
  "name": "front-end",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^4.2.4",
    "@testing-library/react": "^9.3.2",
    "@testing-library/user-event": "^7.1.2",
    "node-sass": "^4.13.1",
    "react": "^16.12.0",
    "react-dom": "^16.12.0",
    "react-scripts": "3.3.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": "react-app"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

我尝试删除并重新安装整个项目，没有运气，重新安装节点和软件包。任何帮助都非常感谢！

Answer 1

将您的react-scripts升级到3.4.0。我刚刚安装了package.json提供的模块，并将react-scripts升级到了最新版本，一切正常。

有关github issue的更多详细信息。

React App：为什么在尝试运行npm start脚本时出现错误？

1 个答案: