I am seeing a weird behaviour with package-lock.json. Once I remove node_modules and package-lock.json and then build them, my application works as expected. When I do a npm install again with just built package-lock.json existing, the file entirely changes removing lot of packages from the tree. When I run the server now, certain Modal (from react-bootstrap ) components don't work properly. I don't understand why this file should change and end up installing different version of dependencies which is breaking the code. Am I doing something wrong with regards to package-lock.json?
Every time I remove both node_modules and this file and build I don't face any issue. Only when this file is already present and I do npm install I run into issues.
npm install creates a new package-lock.json whenever you update node_modules i.e when you install a new module/package. So the overriding of the pre-existing package-lock.json is expected behavior.
As for the Modal breaking it is likely because of version conflict. If you post the 'break' error we could better determine what's causing it but this usually happens when you're packages require a certain version of another dependency.
A possible solution would be to delete node_modules and the original package-lock.json file and then run install. You can also try npm ci.
EDIT
This link might be helpful in giving you more insight into package-lock.json files and how they are affected by npm install. Essentially, once lock file has been generated, it avoids updating to newer versions - until you edit package.json to specify a different version or range. Whatever you're trying to install you should do it from the command line.
npm install changes the packages.json and package-lock.json because it tries to install newer versions of dependencies.
If you don't want this and wish to leverage package-lock.json and leave packages.json as is, try npm ci.
Related
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-dev-server" 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:
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.
Check if C:\Users\Vignesh S\node_modules\webpack-dev-server is outside your project directory.
For example, you might have accidentally installed something in your home folder.
Try running npm ls webpack-dev-server in your project folder.
This will tell you which other package (apart from the expected react-scripts) installed webpack-dev-server.
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.
I did try the following steps that has been advised but in vain. I even tried uninstalling nodejs and reinstalling and many other suggestions in StackOverflow and github. Could someone help me out here.
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:c:\users\aksha\node_modules\babel-eslint (version: 7.2.3)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:
delete package-lock.json (not package.json!) and/or yarn.lock in your project folder.
delete node_modules in your project folder.
remove "babel-eslint" from dependencies and/or devdependencies in the package.json file in your project folder.
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:
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.
check if c:\users\aksha\node_modules\babel-eslint is outside your project directory.for example, you might have accidentally installed something in your home folder.
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 elifecyclenpm err! errno 1npm err! mevo#0.1.0 start: react-scripts startnpm err! exit status 1npm err!npm err! failed at the mevo#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! c:\users\aksha.desktop-8t3go8b\appdata\roaming\npm-cache_logs\2021-02-03t05_26_59_598z-debug.log
Try adding '.env' file in root directory of your project and add this to file -
SKIP_PREFLIGHT_CHECK=true
This might help.
All I am doing is running create-react-app and cd'ing into the app, then trying to run npm/yarn start. I get the following error/output/log. I have walked through all of the suggested steps. The only thing that works is the SKIP_PREFLIGHT_CHECK=true in my .env as the last resort for both
Yarn and npm. I have recently updated to Mojave and had to reinstall my Xcode if people have had a similar experience.
Last login: Tue Oct 30 16:30:24 on ttys002
TheLAB11:~ jasonspiller$ cd repos/react-express-graphql-app/
TheLAB11:react-express-graphql-app jasonspiller$ npm start
> react-express-graphql-app#0.1.0 start /Users/jasonspiller/repos/react-express-graphql-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-jest": "23.6.0"
Don't try to install it manually: your package manager does it automatically.
However, a different version of babel-jest was detected higher up in the tree:
/Users/jasonspiller/node_modules/babel-jest (version: 23.4.2)
Manually installing incompatible versions is known to cause hard-to-debug issues.
If 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-jest" 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/jasonspiller/node_modules/babel-jest is outside your project directory.
For example, you might have accidentally installed something in your home folder.
7. Try running npm ls babel-jest in your project folder.
This will tell you which other package (apart from the expected react-scripts) installed babel-jest.
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! react-express-graphql-app#0.1.0 start: `react-scripts start`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the react-express-graphql-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/jasonspiller/.npm/_logs/2018-10-30T23_09_42_358Z-debug.log
I just had the same problem. For some reason the package ended up in a node_modules directory in my home directory. It also gave me the exact same error for the jest package.
I'm not sure of the correct way to fix this as npm uninstall -g babel-jest and yarn global remove babel-jest do not do anything.
I fixed it by just blowing away the folders that cause the problem:
bash
rm -rf ~/node_modules/babel-jest ~/node_modules/jest
It would be great to know how those packages ended up there, and the proper way of getting rid of them, but for now just deleting the folders is enough to get CRA dev server running without skipping the preflight check.
This problem can occur if there is node_modules in a parent directory of the folder where you run the application. I solved the problem by deleting the node_modules directory.
I too faced a similar problem and was able to resolve the issue following below steps.
Create a .env file in your project root directory and add the following statement
SKIP_PREFLIGHT_CHECK=true
Save the file
Remove node_modules, yarn.lock, package.lock
Then reinstall node_modules with
npm install
This should work
The problem seems to have reappeared in create-react-app 3.0.0.
The react-scripts package provided by Create React App requires a dependency:
"babel-jest": "24.7.1"
As abisuq pointed out in https://github.com/facebook/create-react-app/issues/6756#issuecomment-489562571 adding a version resolutions into package.json temporarily fixes the problem.
"resolutions": {
"babel-jest": "24.7.1"
},
Update: It has been fixed in create-react-app 3.0.1. If upgrading is an option you can run
npm install --save --save-exact react-scripts#3.0.1
or
yarn add --exact react-scripts#3.0.1
run： npm ls babel-jest
got : babelk-jest#24.7.1 & babel-jest#24.8.0 installed
this means install tow babel-jest with diff version
run：npm uninstall babel-jest#24.8.0 fix my issue
I had this issue and finally solved it easily.
As probably you know, when we use create-react-app, Jest is configured by default and you don't need to install Jest (when we use Webpack, we can install Jest). So, if you use Create-react-app and install Jest by mistake:
Firstly uninstall it (remember that if you use: (npm install --save-dev jest), you can remove jest directly from Package.json or use: (npm uninstall --save-dev jest)
Delete package-lock.json (not package.json)
Delete the node_modules
npm install
Now you don't receive an error and you can easily use: (npm start) or (npm test)
Also, It is worth mentioning that I installed the following tools to write my test in React component:
(npm install --save-dev enzyme enzyme-adapter-react-16 jest-enzyme)
and wrote my test by using jest and enzyme. Then I easily use: (npm test)
Good Luck!
Ok I finally found a solution after trying everything. Here is what finally worked:
First of all, read the error message in the cmd from the beginning. They'll tell you what module is causing the problem. You probably have an older version installed on your computer. Example: babel-jest version 2.4.4
Go to your Node.js folder c:/Users/(your user)/node_modules and find that module and simply delete it.
Go back to the cmd and run npm start. You might get the same error. But it'll be for a different module. Just delete it the same way and repeat until it runs.
I fixed the issue by removing the node_modules folder and package-lock.json file from a folder that was higher than the root of the project. I had installed node_modules accidentally in a higher folder.
I had:
desktop/code/node_modules (remove this to fix)
desktop/code/package-lock.json (remove this to fix)
desktop/code/project/node_modules
desktop/code/project/package-lock.json
I was having this issue as well. When I tried to run the client using npm start, the error would occur, telling me that it required babel-jest: ^24.9.0.
I noticed that in my client, babel-jest was version ^24.9.0, but in my server, I had "jest": "^26.6.3".
All I had to do was change "jest": "^26.6.3" to "jest": "^24.9.0" in the server side source code, delete my package-lock.json as well as node_modules in server, npm install again, and good to go!
At first I installed these (my react version was "^17.0.2")
npm install --save-dev jest
npm install --save-dev enzyme enzyme-to-json
npm install #wojtekmaj/enzyme-adapter-react-17
After that, I had the same problem.
Then I did these steps :)
Added '.env' file in my project root directory and add:
SKIP_PREFLIGHT_CHECK=true
Removed node_modules & package.lock
npm install
npm start
I had the exact same issue.
What I tried was to create the react app outside the directory that had the node_modules folder.
After that, started the app with yarn start and didn't have the error anymore.
I had the same problem, and I fixed this issue. For some reason because node_modules on my local. I removed babel-jest & jest. After that, npm start. I'm not sure this solved incorrect but this correct for me.
I solved this issue by deleting the node_modules folder and package-lock.json file I accidentally had installed in the root of my user.
For me in Mac the path was:
Macintosh HD -> Users -> "My-user-name"
I discover that might be the problem by running npm ls babel-jest on terminal. That showed me that there was another babel-jest up in the tree.
After deleting these two I did npm install in my app where I previously had deleted the node_modules folder and package-lock.json.
Now it's running ok !
I fixed this by deleting node_module folder in the project directory
try this command and see which packages create conflicts in versions.
npm ls babel-jest
replace the conflicted packages with updated one of that package.
I tried all of written solutions above. But none of them worked. I solved problem by deleting "C:\node_modules" folder.
Then delete project node_modules and package-lock.json. Finally, npm install and start again. And it worked.
My react-scripts version is 4.0.3. The problem suddenly happened after installing a private remote package, which installed multiple babel packages in my project root's node_modules. I solved this by installing the problematic packages on the project root's level explicitly, so that they match the versions reported in the preflight check.
Following addings fixed it in my case. Your needed packages and versions may differ, you have to check the preflight report.
yarn add babel-jest#^26.6.0
yarn add babel-loader#8.1.0
For me its still a workaround, but i prefer this way instead of removing something in node_modules manually as suggested in https://stackoverflow.com/a/53093421/4840661.
This is the approach without deleting node_modules:
I recieved error like:
The react-scripts package provided by Create React App requires a dependency:
"jest": "26.6.0"
Don't try to install it manually: your package manager does it automatically.
However, a different version of jest was detected higher up in the tree:
First check the versions using:
npm ls babel-jest
In my case output was like this:
jest#27.0.3
└─┬ #jest/core#27.0.3
└─┬ jest-config#27.0.3
└── babel-jest#27.0.2
After that uninstall babel-jest by
npm uninstall babel-jest
(When you see the single version of babel-jest,otherwise go as versions as follows)
npm uninstall babel-jest#27.0.2
Then install required dependencies using
npm i babel-jest#version jest#version
(Where version is the one come in 1st point)
This works for me like a charm. Hope this solves you too.
Got this error in the netlify ci, here's the fix that worked for me:
this method works for any lib i got a error for eslint instead of babel-jest.
force the error to be shown by npm i -s #babel-jest/VERSION --force
replace VERSION with whatever version shows in the error(23.6.0 in this case),
the correct error message will be shown locally
use https://www.npmjs.com/package/npm-check-updates to upgrade your package.json flie with the correct versions
run ncu -u in dir of package.json after installing the npm package
globally
finally do a npm ci
this will delete the package-lock and node_modules and install the new versions based on the second step
this work for me.
clear caches in npm or yarn
remove node_modules and lock files
create .env file
add " SKIP_PREFLIGHT_CHECK=true " to an .env file in your project.
my issue was that I have both frontend and backend that I am running concurrently. I installed jest to my root project (for backend) and I guess there is collision with pre-installed react jest. I just uninstalled jest from backend and voila I am happy now. I don't have anything related with babel.
i had the similar problem and wasted my 2-3 days
The easiest way to solve this problem is :
1.go outside of src, and create .env file.
2.Inside .env file, just write this single line and save it:
SKIP_PREFLIGHT_CHECK=true
3.then npm start
Hope this helps, Happy coding!!!
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:
"eslint": "5.6.0"
Don't try to install it manually: your package manager does it automatically.
However, a different version of eslint was detected higher up in the tree:
D:\chintu\blog-exambunker-master\blog-exambunker-master\node_modules\eslint (version: 5.6.1)
how to install the version 5.6.0 I am installing the eslint it always gets installed with the latest version, can someone suggest me what to do?
The error is an incompatibility between eslint and babel-eslint versions. To do solve this, firstly you need to remove your eslint package using npm uninstall eslint. This command will delete your eslint package. After this, you need to install the 5.6.0 version of eslint, so write this command npm i eslint#5.6.0. I hope that this will be helpful for you. Also, you can delete your node_modules folder and then install it.
(Do not do what I did if you don't read everthing I posted) At least with me, I just downgraded my eslint 5.8.0 to 5.6.0 (manually). Why? Because when I use some eslint library like airbnb, it installs the latest version of eslint (5.8.0) automatically, the problem here is that this version has conflict with the previous eslint version used by react (5.6.0), so when you downgrade, you just return to the previous eslint installed, so it's working fine here, but you've to be careful when you update your react version.
I searched where the eslint was with:
npm ls eslint
then I deleted it with:
npm uninstall ls eslint
Finally I ran
npm start
and it worked.
Create a file .env in your root directory.
And you can ignore the check by putting
SKIP_PREFLIGHT_CHECK=true
in .env file.
Ref: https://github.com/facebook/create-react-app/issues/5247#issuecomment-427221678
Edit: This is not the solution to this problem. It is just to ignore the error as it is discussed in the issue.
I have the exactly same problem. I have tried everithing from those Suggestions:
Delete package-lock.json (not package.json!) and/or yarn.lock in your project folder.
Delete node_modules in your project folder.
Remove eslint from dependencies and/or devDependencies in the package.json file in your project folder.
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:
If you used npm, install yarn 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.
Check if C:\Users\User\node_modules\eslint is outside your project directory.
For example, you might have accidentally installed something in your home folder.
Try running npm ls eslint in your project folder.
This will tell you which other package (apart from the expected react-scripts) installed eslint.
nothing worked. every time I am doing npm install/yarn it keeps install the old version of eslint.
ok I find my issue: I had npm packeges and some more crap outside the projects folders (on c:/users/user) they may had the old version of eslint. cheack it out and tell me if you still have the problem or not.
I deleted a node modules folder that contained an older version of eslint. I found this to be the easiest solution rather than changing dependencies.
What solved this for me, was that in the error message, it told me that there was eslint installed in project with 5.6.0 and another installed in users/andrew/nodemodules/eslint with a version of 4.1.6 I tried doing a npm uninstall -g eslint but that didnt work so then I just searched for all the files and folders within users/andrew/nodemodules/eslint
and deleted them, and it worked for then.
I'm not sure if this is a good way to do it, but its worked.
Simple delete package-lock.json and node_modules then run npm install then
npm start
else you could install
npm i eslint#5.6.0 then
npm start
enjoy your work :)
List item
Open a NEW terminal window within root.
Run the command
npm ls eslint
this should show you the installations that are 'higher' up the dependency tree.
Navigate into the folder(s) that contain gulp-eslint/eslint/babel-eslint or even a sneaky node_modules/ that shouldn't have been installed globally.
Next, run either or all of these commands depending on where the files are situated.
rm -rf node_modules/
rm -rf (name of other folders like eslint/gulp-eslint)
RETURN TO YOUR PROJECT
Better to be safe than sorry, run the following commands to make sure it will work properly again.
Within the root directory of your project
rm -rf node_modules/
rm -rf package-lock.json
(If it didn't remove the node_modules just delete it from your folder)
Finally, Run the following.
npm install
then
npm start
go to node_modules folder and open react-scripts/package.json , find the eslint dependencies and change it. its fixed this way.
https://github.com/wesbos/eslint-config-wesbos/issues/17
In the above mentioned link they suggested to install #abhijithvijayan/eslint-config as peer dependency. See if this works for you.
you might install a global eslint like this
{22:14}~/go/src/github.com ➭ npm ls eslint
/Users/demon
└── eslint#6.1.0
then run
{22:14}~/go/src/github.com ➭ npm uninstall eslint
in the global terminal instead of vscode's terminal. then run
npm start
I just used this command: "npm uninstall eslint". Later I just ran mu=y code using npm run start and it worked. I did not have to delete or edit any file
Add SKIP_PREFLIGHT_CHECK=true to an .env file in your project.
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:
"eslint": "5.6.0"
Don't try to install it manually: your package manager does it automatically.
However, a different version of eslint was detected higher up in the tree:
/Users/macbook/node_modules/eslint (version: 3.19.0)
Manually installing incompatible versions is known to cause hard-to-debug issues.
If 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:
Delete package-lock.json (not package.json!) and/or yarn.lock in your project folder.
Delete node_modules in your project folder.
Remove "eslint" from dependencies and/or devDependencies in the package.json file in your project folder.
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:
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.
Check if /Users/macbook/node_modules/eslint is outside your project directory.
For example, you might have accidentally installed something in your home folder.
Try running npm ls eslint in your project folder.
This will tell you which other package (apart from the expected react-scripts) installed 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! 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/macbook/.npm/_logs/2018-11-01T15_26_42_405Z-debug.log
After installing ESLint through NPM, I'm getting the following error in my browser:
Error: Cannot find module 'eslint/lib/rules/no-unused-expressions'
Referenced from:
Any idea what could cause this and how I can fix it?
Try these steps:
Delete package-lock.json file
Delete node_modules folder
Delete .eslintrc file
Remove devDependencies that contains 'eslint'
In the terminal type: npm install
In the terminal type: npm run start
In case you want to have eslint, try checking if you have in your devDependencies the line below:
"eslint": "5.6.0"
NPM INSTALL ESLINT
I had this issue while using a create-react-app. React scripts already come with an eslint version installed and that means you shouldn't need to install eslint on your own. I fixed this issue by doing the following:
Deleted node-modules folder
Deleted my package-lock.json file
Removed my local installation of eslint from the package.json file
Installed all packages again npm install
npm start and everything was working fine again
Deleted node-modules folder
Deleted my package-lock.json file
Removed eslint from the package.json file
Installed all packages again
npm install
npm start
and everything was working fine again
Easy fix #1
npm i -D --save eslint-loader
Easy fix #2
npm i -D --save eslint#5.16.0
Explanation:
If you look at the error stack trace you'll see the error is actually fired from eslint-loader/index.js (so not eslint).
Then in node_modules, you can find eslint-loader and check the version in its package.json. It's probably quite outdated. Mine was at 1.9.0, while the current version of eslint-loader is 4.0.2
And back to the error - that path that it is complaining about apparently did get changed from eslint/lib/formatters/stylish to eslint/lib/formatters/<some-other-folder>/stylish in a newer version of eslint (I think v6). And now this older eslint-loader version is failing to find the updated path in eslint.
So either upgrading eslint-loader to a newer version that knows this new path (Easy fix 1), or downgrading eslint down to when it had that old path (Easy fix 2), should both work.
For the record I think this outdated dependency is coming from webpack, which makes it difficult to debug for the create-react-app folks.
Make sure you clean your node_modules. Delete your package-lock.json. and run the
npm cache clean --force to clean the cache.
Now install the eslint by running below in the directory:
npm i --save eslint
I know it's late to answer, maybe it's gonna help someone who comes to this thread.
for linux user and using npx just type npx eslint --init as the documentation says