首页新闻找找看学习计划

react 跑项目时 npm start 报错

0
悬赏园豆:10 [已关闭问题] 关闭于 2019-01-10 22:26

my-app@0.1.0 start /Users/jjsxu/Desktop/react/my-app
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-loader": "8.0.4"

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

/Users/jjsxu/node_modules/babel-loader (version: 7.1.5)

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-loader" 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:

  1. 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.

  2. Check if /Users/jjsxu/node_modules/babel-loader is outside your project directory.
    For example, you might have accidentally installed something in your home folder.

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

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! my-app@0.1.0 start: react-scripts start
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the my-app@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/jjsxu/.npm/_logs/2018-12-29T06_41_33_505Z-debug.log

長岛冰茶的主页 長岛冰茶 | 初学一级 | 园豆:151
提问于:2018-12-29 14:50
< >
分享
所有回答(1)
0

把nodemodule 删了,重新 npm install 一下。

jiang_fafa | 园豆:86 (初学一级) | 2019-05-17 17:16

怎么解决的老铁,我也遇到了相同的问题。

支持(0) 反对(0) sgaogao | 园豆:200 (初学一级) | 2019-08-11 00:02
清除回答草稿
   您需要登录以后才能回答,未注册用户请先注册