While working on my react project, I just tried to install react-router-dom and somehow it seems it erased all my scripts and modules. Now I cannot run the server again no matter what I do. I also cleaned working directories and even deleted the branch, but it still doesn't work at all..
and below is the error message when I hit 'npm start'.
Although I don't know why installing react-router-dom removed all my packages, I reinstalled node modules and now it works again. :)
Related
I was working with brownie and everything was working smoothly, launched my first useDapp app and it was a lot of fun. I wanted to see what truffle was about and installed it via npm and there were a bunch of warnings and it didn't seem smooth when it came to functionality so I might have installed it via yarn, expecting the package installer to fix things. It worked for a while then it started to timeout upon migration with tested code that used to launch perfectly fine? I thought it might of been a bug or some form of overlapping installation. I moved on to hardhat and installed it via NPM and it wouldn't compile, so I installed it via Yarn and it compiled fine. I went on to creating a new file and accidentally hit Esc when it was initializing a new file and setting the root. Somewhere in between there I tried to install the shorthand and it didn't work. It only opened a Windows help window instead of call hardhat when I typed hh --help. After that I couldn't call hardhat via yarn hardhat nor npx hardhat outside of the file....the file that previously wouldn't compile was still able to compile via npx hardhat compile?
It sometimes says "module not found", other times it says something about local installation.
I kind of got frustrated and wanted to play with react a little more and when I went to start yarn I got an error message. I followed the prompt and it didn't work, I googled it and had no luck with their common resolutions. I tried to upgrade eslint and even install 7.11.0 and it keeps saying I have version 5.16.0?.
EDIT: not sure if it is relevant, I tried to update my yarn to 1.22.17 and it said it did, although it says im running 1.22.15.
windows 7
node = v12.13.0
npm =6.12.0
The react-scripts package provided by Create React App requires a dependency:
"eslint": "^7.11.0"
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:
C:\Users\Nancy\node_modules\eslint (version: 5.16.0)
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 "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 C:\Users\Nancy\node_modules\eslint is outside your project directory.
For example, you might have accidentally installed something in your home folder.
7. 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!
error Command failed with exit code 1.
Kind of embarrassing, the answer was in the error message.
6. Check if C:\Users\Nancy\node_modules\eslint is outside your project directory.
For example, you might have accidentally installed something in your home folder.
Hardhat set root in the wrong directory and I ended up with a node_module folder in a parent directory that was messing things up
Reinstalled truffle globally via yarn add global truffle and it ran smoothly. Evidently, truffle acts up with certain NPM versions.
Hardhat doesn't seem to support global installations yet. Its been working fine being locally installed into each separate hardhat project via yarn add -D hardhat
I haven't been able to get the shorthand to work without invoking yarn first, such as yarn hh <command>
Trying to fork pancakeswap from https://github.com/pancakeswap/pancake-frontend.
Steps what I did,
Clone Repo
Run npm install command
Run npm start command
Solve some no-used props error by commenting that props. After that also 2 errors are still in application.
Error1: JSX props should not use functions react/jsx-no-bind
Error2: defaultProp "expanded" has no corresponding propTypes declaration react/default-props-match-prop-types
Help me to solve this. Stuck more than 5 days. Searched many pages but no use. Most of them are suggested to change jsx functions. Is there is any simple way to solve these errors?
I did the same yesterday and it worked. There are still some elements that I need to figure out, but to make it running on localhost wasn't hard.
Before running pancakeswap frontend we need to have nodejs installed. Should work with any version 16, my was v16.14.0. Second is to have installed yarn as they don't use npm. This we know because the project has yarn.lock file. Third is have nextjs installed globally like yarn. With this we should be able to install and run the app.
Next steps would be:
Clone repo or just download it, will work as well
Run yarn install command (or just yarn - works the same)
Run yarn build (this will call next build)
Run yarn start (this will call next start)
After last step the app should start on localhost:3000
This is what I did and it worked. Keep in mind that this is valid for the current version and could change in future.
I was running my project finely, but I merge my code with other which contain a package called react-modal, after that my code doesn't work. I revert that code from my project, but it doesn't work, I can't even run my project. "cannot read properties of undefined" error is occuring. I upgrade all my packages like webpack, webpack cli etc, but it doesn't helps. What I need to do to run my project?
Well you can do two things here.
First to revert your code back to your latest code before merge.
Run the below command to delete Node_modules npm prune --production
and then run npm install and then build your project.
I've been using create-react-app to make some projects in react and also for practicing, and usually the way to run the project is to use the command npm start from the root directory of that project in the terminal. This has since stopped working for both my old projects which I haven't touched or completely new ones, and followed the exact instructions given by the error already to no effect.
An image of the error, the very top of the terminal is immediately after the npm start command:
I have been googling this over the past two days and I simply can't figure it out. I'm hoping someone with better knowledge would know the root of why npm start has stopped working. Please keep in mind that I already tried the suggestions provided by the error in the terminal.
What's really mind boggling is I haven't changed pcs or done any editing in the old projects such as the one in the picture above, re-installed a bunch of stuff I thought might have been causing issues like npm or babel but they simply don't launch anymore.
Also almost forgot the error log, which has been even more confusing to figure out or google:
You have problem with your dependencies. Please run
npm i
inside project directory.
As your console shows, you can try
remove your node_modules directory
delete file package-lock
I suggest clean npm cache (npm cache clean -f)
and reinstall node_modules using
npm i
There are many reasons to cause this problem.Some suggestions here:
1.uninstall babel-loader and create-react-app globally
npm uninstall -g babel-loader
npm install -g create-react-app
2.remove the error package
rm -rf ~/node_modules/babel-loader
3.stop all the command then clean up the cache of npm
hope you can help. I'm trying to install mauron85 react-native-background-geolocation and when i go to link the dependencies (react-native link react-native-mauron85-background-geolocation) i keep getting 'react-native: command not found'. i've installed npm, nodejs, react native (npm install -g react-native-cli), flow, watchman and the mauron85 package. i'm running this on ubuntu and have tried on mac and getting the same error message on both. I've also tried doing the manual setup for android and this hasn't worked because I don't have some of the node modules it needs, and have tried adding the right path to my path variable, which has made no difference. Is there anything obvious I'm missing that I've forgotten to install/has anyone had a similar message before?
Thanks!