npm start命令无法启动开发服务器

时间：2020-09-27 05:09:06

标签： create-react-app

我试图使用Create React App构建一个基本的React应用程序。在使用命令npm install -g create-react-app然后使用create-react-app my-app创建React应用程序之后。 （这是我在Windows上以来必须使用的解决方法）。根据Git Bash的说法，它能够成功创建一个新的React应用程序。这是显示的特定消息：

Shreya Basu@SKINNYMAN MINGW64 ~/Workspace
$ create-react-app my-app

Creating a new React app in C:\Users\Shreya Basu\Workspace\my-app.

Installing packages. This might take a couple of minutes.
Installing react, react-dom, and react-scripts with cra-template...


> core-js@2.6.11 postinstall C:\Users\Shreya Basu\Workspace\my-app\node_modules\babel-runtime\node_modules\core-js
> node -e "try{require('./postinstall')}catch(e){}"


> core-js@3.6.5 postinstall C:\Users\Shreya Basu\Workspace\my-app\node_modules\core-js
> node -e "try{require('./postinstall')}catch(e){}"


> core-js-pure@3.6.5 postinstall C:\Users\Shreya Basu\Workspace\my-app\node_modules\core-js-pure
> node -e "try{require('./postinstall')}catch(e){}"

+ cra-template@1.0.3
+ react-scripts@3.4.3
+ react@16.13.1
+ react-dom@16.13.1
added 1598 packages from 746 contributors and audited 1602 packages in 94.891s

70 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities


Initialized a git repository.

Installing template dependencies using npm...
npm WARN tsutils@3.17.1 requires a peer of typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.1.2 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\jest-haste-map\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\watchpack-chokidar2\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\webpack-dev-server\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

+ @testing-library/user-event@7.2.1
+ @testing-library/jest-dom@4.2.4
+ @testing-library/react@9.5.0
added 36 packages from 56 contributors and audited 1638 packages in 25.518s

70 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities

Removing template package using npm...

npm WARN tsutils@3.17.1 requires a peer of typescript@>=2.8.0 || >= 3.2.0-dev || >= 3.3.0-dev || >= 3.4.0-dev || >= 3.5.0-dev || >= 3.6.0-dev || >= 3.6.0-beta || >= 3.7.0-dev || >= 3.7.0-beta but none is installed. You must install peer dependencies yourself.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\webpack-dev-server\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\jest-haste-map\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@2.1.2 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@2.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.13 (node_modules\watchpack-chokidar2\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

removed 1 package and audited 1637 packages in 10.793s

70 packages are looking for funding
  run `npm fund` for details

found 0 vulnerabilities


Created git commit.

Success! Created my-app at C:\Users\Shreya Basu\Workspace\my-app
Inside that directory, you can run several commands:

  npm start
    Starts the development server.

  npm run build
    Bundles the app into static files for production.

  npm test
    Starts the test runner.

  npm run eject
    Removes this tool and copies build dependencies, configuration files
    and scripts into the app directory. If you do this, you can’t go back!

We suggest that you begin by typing:

  cd my-app
  npm start

Happy hacking!

但是，当我尝试使用命令npm start时，什么也没有发生，甚至没有错误消息。这就是所有显示的内容：

$ npm start

> my-app@0.1.0 start C:\Users\Shreya Basu\Workspace\my-app
> react-scripts start

我检查了是否将忽略脚本设置为true，但事实并非如此。我还尝试在CMD上运行这些命令，以查看这是否会有所帮助。我不确定我在哪里搞砸了？有什么线索我想念吗？

其他信息： package.json 

{
  "name": "my-app",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^4.2.4",
    "@testing-library/react": "^9.5.0",
    "@testing-library/user-event": "^7.2.1",
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-scripts": "3.4.3"
  },
  "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"
    ]
  }
}

1 个答案:

答案 0 :(得分：2)

create-react-app不再起作用。基于official docs，您将需要命令npx create-react-app your-app

如果您以前是通过create-react-app在全球安装npm install -g create-react-app的，建议您卸载该软件包 使用npm uninstall -g create-react-app来确保npx始终使用 最新版本。

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