Question

你好，我正在尝试为reactJS应用程序运行npm服务器，但是这样做很麻烦。我不知道自己在做什么错，因为我正在按照终端给出的说明进行操作。

我试图摆脱webpack依赖关系和节点模块，并尝试运行npm start。

package.json

    {
      "name": "caregiver",
      "version": "0.1.0",
      "private": true,
      "dependencies": {
        "react": "^16.7.0",
        "react-dom": "^16.7.0",
        "react-scripts": "2.1.3"
      },
      "scripts": {
        "start": "react-scripts start",
        "build": "react-scripts build",
        "test": "react-scripts test",
        "eject": "react-scripts eject"
      },
      "eslintConfig": {
        "extends": "react-app"
      },
      "browserslist": [
        ">0.2%",
        "not dead",
        "not ie <= 11",
        "not op_mini all"
      ]
    }

正在输出的错误注释。

    > caregiver@0.1.0 start /Users/JafferSyed/Desktop/MainProjects/caregiver
    > react-scripts start


    There might be a problem with the project dependency tree.
    It is likely not a bug in Create React App, but something you need to fix locally.

    The react-scripts package provided by Create React App requires a dependency:

      "webpack": "4.19.1"

    Don't try to install it manually: your package manager does it automatically.
    However, a different version of webpack was detected higher up in the tree:

      /Users/JafferSyed/node_modules/webpack (version: 4.28.2)

    Manually installing incompatible versions is known to cause hard-to-debug issues.

    If you would prefer to ignore this check, add SKIP_PREFLIGHT_CHECK=true to an .env file in your project.
    That will permanently disable this message but you might encounter other issues.

    To fix the dependency tree, try following the steps below in the exact order:

      1. Delete package-lock.json (not package.json!) and/or yarn.lock in your project folder.
      2. Delete node_modules in your project folder.
      3. Remove "webpack" from dependencies and/or devDependencies in the package.json file in your project folder.
      4. Run npm install or yarn, depending on the package manager you use.

    In most cases, this should be enough to fix the problem.
    If this has not helped, there are a few other things you can try:

      5. If you used npm, install yarn (http://yarnpkg.com/) and repeat the above steps with it instead.
        This may help because npm has known issues with package hoisting which may get resolved in future versions.

      6. Check if /Users/JafferSyed/node_modules/webpack is outside your project directory.
        For example, you might have accidentally installed something in your home folder.

      7. Try running npm ls webpack in your project folder.
        This will tell you which other package (apart from the expected react-scripts) installed webpack.

    If nothing else helps, add SKIP_PREFLIGHT_CHECK=true to an .env file in your project.
    That would permanently disable this preflight check in case you want to proceed anyway.

    P.S. We know this message is long but please read the steps above :-) We hope you find them helpful!

应该让npm开始运行服务器并在本地主机或实时服务器上显示该应用。

Answer 1

您需要从当前项目文件夹中运行{ "hosting": { "public": "build", "ignore": ["firebase.json", "**/.*", "**/node_modules/**"], "headers": [{ "source": "/service-worker.js", "headers": [{ "key": "Cache-Control", "value": "no-cache" }] }], "rewrites": [ { "source": "**", "destination": "/index.html" } ] } }。 Npm实际上使用的是用户文件夹npm install（父文件夹），而不是项目的node_modules。

由于相关性问题而无法启动服务器

1 个答案: