npm start缺少脚本: start

Question

以下是我尝试输入"npm start“时命令提示符所显示的内容：

┌──────────────────────────────────────────────────────────────────────────┐
│                         npm update check failed                          │
│                   Try running with sudo or get access                    │
│                   to the local update config store via                   │
│ sudo chown -R $USER:$(id -gn $USER) C:\Users\User's privacy\.config │
└──────────────────────────────────────────────────────────────────────────┘
npm ERR! missing script: start

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\User's privacy\AppData\Roaming\npm-cache\_logs\2020-08-17T19_46_48_248Z-debug.log

有没有人能帮帮我？

顺便说一下，这是我的package.json文件：

{ "name"："react-app"，"version"："0.1.0"，"private"：true，“依赖”：{ "react"："^16.13.1"，"react-dom"："^16.13.1"，"react-scripts"："3.4.3“}}

Answer 1

我也有同样的问题，问题是当npm在我的笔记本电脑上加载完整的react项目时，我中断了它，因为它需要5分钟以上，而我并没有意识到这一点。结果,

"scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  }

一堆其他的东西也不见了。如果项目已完全加载，您的package.json将如下所示：

{
  "name": "app0",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.11.9",
    "@testing-library/react": "^11.2.5",
    "@testing-library/user-event": "^12.7.1",
    "react": "^17.0.1",
    "react-dom": "^17.0.1",
    "react-scripts": "4.0.2",
    "web-vitals": "^1.1.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

Answer 2

您应该在package.json中添加类似以下内容的内容

  "scripts": {
    "start": "node index.js",
  },

Answer 3

通常，查看错误将为您提供一些有关解决问题所需操作的详细信息。在本例中，您会看到以下错误：

"npm错误！缺少脚本:开始“

这意味着node正在寻找启动脚本。这意味着您需要在package.json文件中添加一个脚本。

文件中的内容如下所示：

"scripts": { "start" : "bar ./test" } }