'yarn start' 抛出 babel-eslint 错误 MacOS，我该如何解决这个错误？

Question

我正在尝试创建一个 React.js 应用程序，但是一旦创建，我尝试在终端中使用“yarn start”运行我得到这个：

yarn run v1.12.3
$ 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:

  "babel-eslint": "10.0.1"

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

  /Users/olliesaunderson/node_modules/babel-eslint (version: 9.0.0) 

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 "babel-eslint" 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/olliesaunderson/node_modules/babel-eslint is outside your project directory.
     For example, you might have accidentally installed something in your home folder.

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

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!

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

我已尝试按照建议的步骤进行操作，但是这些似乎都不起作用。 我也试过yarn add --exact react-scripts@3.0.1和yarn cache clean

Answer 1

我修好了它！

因此，正如错误所示，在我的依赖关系树中较高的某个位置有一个现有的“babel-eslint”文件夹。 我所要做的就是在finder中搜索该文件夹，然后将其删除，完成后您可以再次“纱线安装”和“纱线启动”，然后它应该可以工作:)

我不知道这个另一个“babel-eslint”文件夹来自哪里......