运行 npm start 时 Babelloader 多个版本错误

Question

Npm 安装在我使用 MacOS 的机器上，在我运行 npm run start 或 npm start .

There might be a problem with the project dependency tree.
[0] It is likely not a bug in Create React App, but something you need to fix locally.
[0] 
[0] The react-scripts package provided by Create React App requires a dependency:
[0] 
[0]   "babel-loader": "8.0.6"
[0] 
[0] Don't try to install it manually: your package manager does it automatically.
[0] However, a different version of babel-loader was detected higher up in the tree:
[0] 
[0]   /Users/user1/node_modules/babel-loader (version: 8.1.0) 
[0] 
[0] Manually installing incompatible versions is known to cause hard-to-debug issues.

如果是 Babel-Loader 问题，我将其删除，然后当我运行:

npm ls babel-loader

它仍然存在，返回这个：

react-scripts@3.4.0
  └── babel-loader@8.0.6

Babel-loader 未在 package.json 文件中列出。我真的不确定如何完全卸载babel-loader，如果我不确定是否需要重新安装它。

Answer 1

根据根本原因，您有两种可能的方法。默认答案是删除您的锁定文件和 node_modules 文件夹，然后重新生成锁定文件。

$ rm package-lock.json # or `rm yarn.lock`
$ rm -rf node_modules/
$ npm install # or `yarn install`

这并不总是有效。如果问题仍然存在，请执行以下操作。

$ npm ls babel-loader # or `yarn list babel-loader`
warning Lockfile has incorrect entry for "babel-loader@^<bad-version>". Ignoring it.
warning Filtering by arguments is deprecated. Please use the pattern option instead.
├─ babel-loader@<bad-version>
└─ react-scripts@4.0.3
   └─ babel-loader@<good-version>
✨  Done in 1.17s.

完成后，打开 package.json 并添加以下内容：

{
  // ...
  "resolutions": {
    "babel-loader": "<good-version>"
  }
}

运行 npm start 时 Babelloader 多个版本错误

Babelloader multiple versions error when running npm start

npm

reactjs

babel-loader