错误！缺少脚本："start"

Question

我是新手 js.Trying 反应运行一个简单的应用程序并收到此错误并且无法弄清楚出了什么问题

D:\React app\react-app1>npm start
npm ERR! Missing script: "start"
npm ERR!
npm ERR! Did you mean one of these?
npm ERR!     npm star # Mark your favorite packages
npm ERR!     npm stars # View packages marked as favorites
npm ERR!
npm ERR! To see a list of scripts, run:
npm ERR!   npm run

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Muralidharan\AppData\Local\npm-cache\_logs22-05-29T08_51_37_315Z-debug-0.log

这是package.json文件

{
  "name": "react-app1",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "react": "^18.1.0",
    "react-dom": "^18.1.0",
    "react-scripts": "5.0.1"
  }
}

Answer 1

发生这种情况是因为您的 package.json 文件中没有名为“start”的脚本。下面是一个 package.json 文件的示例，其中包含这样的脚本：

{
  "name": "your-project",
  "version": "1.0.0",
  "description": "",
  "main": "main.js",
  "scripts": {
    "start": "node main.js"
  },
  "author": "Muralidharan",
  "dependencies": {
  }
}

Answer 2

将此添加到您的 package.json

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

start 是触发 react-script 到运行项目所需的命令构建、测试和弹出是您在开发过程中需要的其他命令

Answer 3

感谢所有回答问题的人，问题出在过时的版本上所以我这样做是为了解决

1. npm uninstall -g create-react-app
2. npm install create-react-app  ( v1.5.2 is outdated and no longer supported )
3. npx create-react-app react-app
4. cd react-app
5. npm start

错误！缺少脚本："start"

npm ERR! Missing script: "start"

node.js

reactjs