尝试在之后立即启动 React 时出现错误（项目依赖关系树可能有问题......）

Question

我已经从 npx create-react-app 创建了 React App。而且，我尝试 cd 并启动应用程序并显示此错误。我也尝试过使用纱线并重新安装节点。我非常迷茫，因为它也像 30 分钟前一样在 wooooorking。我唯一做的就是 npm i -g npm 来更新 npm，从那以后它就不起作用了。

We suggest that you begin by typing:

  cd giact
  yarn start

Happy hacking!
gi@Gis-Macbook-Pro study % cd giact
gi@Gis-Macbook-Pro giact % npm start

> giact@0.1.0 start /Users/gi/Desktop/Study/giact
> 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": "10.1.0"

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/gi/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/gi/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!

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! giact@0.1.0 start: `react-scripts start`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the giact@0.1.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/gi/.npm/_logs/2020-04-19T18_13_36_022Z-debug.log

Answer 1

1) Create React App 提供的 react-scripts 包需要依赖：

"babel-eslint": "10.1.0", "eslint": "^6.8.0"

使用命令：npm install eslint@6.x babel-eslint@10 --save-dev

Answer 2

/Users/gi 去这个并输入 npm i babel-eslint@10.1.0 它会解决你的问题。它对我有用

Answer 3

删除“C:\Users”文件夹中的 node_modules 解决了我的问题。

Answer 4

快速解决方法是在项目文件夹中创建一个名为 .env 的文件，其中包含以下内容 SKIP_PREFLIGHT_CHECK=true

我无法让其他任何东西工作，npm、yarn、删除锁、删除 node_modules 等。这只是在我的 linux mint 环境中发生，而不是在 windows 或 ubuntu 上。

Answer 5

我遵循了一些对我有用的步骤。

第 1 步：更改您的项目位置，就像您将其保存在 D drive 上一样将其更改为 E drive。

第 2 步：删除节点模块。

第 3 步：运行此命令安装节点模块 >> npm install

Answer 6

对我有用的是在我的 Mac 上搜索 node_modules 的所有实例，删除所有实例，转到要托管这些文件的目录，然后在该目录的终端中重新运行以下命令：

--> npm install -g create-react-app
--> create-react-app jsx 

（更改到您的 React 目录（即您的 React 项目的名称，在我的例子中是 'jsx'））

--> npm start

Answer 7

当我在另一个反应项目中创建反应项目时，我遇到了这种错误。如果你的 react 项目在另一个 react 项目中，这种错误很常见。