NPM Install Error:Unexpected end of JSON input while parsing near '...nt-webpack-plugin":"0'

This solved it for me:

Open Windows Powershell as admin

npm cache clean --force
npm install -g @angular/cli

https://devblogs.microsoft.com/premier-developer/getting-started-with-node-js-angular-and-visual-studio-code/

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Solution:

npm cache clean --force

then try again to create your app (here when creating a react app) or install what you were about to install.

create-react-app myproject

(creating react app)[same npm problem that can occur in different operation]

npm install -g @angular/cli@latest

(installing angular cli (or installing anything else))

It will work.

explanation:

https://i.stack.imgur.com/UNJPw.png

https://i.stack.imgur.com/t9jeS.png

https://i.stack.imgur.com/LRrND.png

https://i.stack.imgur.com/INiqo.png

Here a good link from the doc: https://docs.npmjs.com/cli/cache

[Update] Also if it happen that this didn't solve it, you may check this answer here https://stackoverflow.com/a/50191315/7668448 it show how you can change the npm registry, that can be helpful. Check and see.

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If

npm cache clean --force

doesn't work. try

npm cache clean --force
npm update

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Npm uses Cache for downloading new packages for you. You need to clear your npm cache. use following command to clean :

npm cache clean --force

then normally use your npm install command e.g.

npm install -g @angular/cli

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I solve that with

npm cache clean --force

then update npm

npm i npm@latest -g

then normally use your npm install command

npm install 

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delete npm and npm-cache folders in C:\Users\admin\AppData\Roaming\ (windows) then execute cmd

npm cache clear --force npm cache verify

update npm to latest version

npm i -g npm

then create your project 1)Angular

npm i -g @angular/cli@latest ng new HelloWorld

2)React

npm i -g create-react-app create-react-app react-app

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None of the 30 answers here worked for me. I needed to:

delete node_modules and package-lock.json npm cache clean --force npm install -g @angular/cli npm i --package-lock-only npm ci

Phew!

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this solved it npm cache clean --force

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Simple solutions:

npm cache clean --force
npm install 

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This command alone solved my problem:

npm cache clean --force

Also you should make sure you are using the correct version of node.

Using nvm to manage the node version:

nvm list; # check your local versions;
nvm install 10.10.0; # install a new remote version;
nvm alias default 10.10.0; # set the 10.10.0 as the default node version, but you have to restart the terminal to make it take effect;

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I use Windows and removed all the files that were listed below and my problem was solved C:\Users{{your-username}}\AppData\Roaming\npm-cache

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npm cache clean --force worked for me

Error Resolved :

$ npm install -g gulp npm WARN deprecated gulp-util@3.0.8: gulp-util is deprecated - replace it, following the guidelines at https://medium.com/gulpjs/gulp-util-ca3b1f9f9ac5 npm ERR! Unexpected end of JSON input while parsing near '.../RGs88STtAtiMP3tCiNdU'

npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\admin\AppData\Roaming\npm-cache_logs\2018-11-20T07_38_56_733Z-debug.log

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Solution

npm cache clean --force

For Windows : go to C:\Users\username\AppData\Roaming\npm-cache
Delete all files and run

npm install && npm start

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I solved that by first cleaning the cache using

npm cache clean --force

Then

npm install -g @angular/cli

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My case - Windows 7 (had nothing better at the needed moment). Helped me the following:

Deleting everything from C:\Users\username\AppData\Roaming\npm-cache

AND

Deleting package-lock.json

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I resolved my problem with this one liner

npm cache clean --force

Note: since its a clean install, I had no concerns emptying npm cache.

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ERROR: npm ERR! Unexpected end of JSON input while parsing near '...ore-js":"3.0.0-beta.1

This occurs when installing the expo CLI globally, This works for me!

npm cache clean --force

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I got error (file already exists --force to overwrite) after running the following code:

npm cache clean --force
npm install -g @angular/cli

I solved it using :

npm i -g --force npm

Make sure to run the first commands to flush the cache of npm.

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npm cache clean --force
npm update

Do not forget to do "npm update". it is very important step .

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It's error from your npm....

So unistall node and install it again.

It works....

PS: After installing node again, install angular cli globally.

npm install -g @angular/cli@latest

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I solve that with

First delete package-lock.json

npm cache clean --force

then update npm

npm i npm@latest -g

then use npm install command

npm install 

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If npm cache clean --force doesn't resolve the issue, try deleting the ~/.npm directory (*nix/macOS). This is the directory where node stores its cache, locks, logs, global packages (unless you're using nvm), and modules installed via npx.

First, backup your current ~./npm directory:

mv ~/.npm ~/.npm-backup

Now try running your npm command again. This will create a new ~/.npm directory. If the issue is resolved, you can safely remove you backup. Before doing so, you may want to review the global packages installed in your ~/.npm-backup directory so you can reinstall them using npm i -g [package].

rm -rf ~/.npm-backup

If the issue is not resolved, you can restore your backup:

rm -rf ~/.npm
mv ~/.npm-backup ~/.npm

Careful with those rm commands, folks!

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If you looking for npm install and getting same kind of error

Delete package-lock.json and npm cache clean --force and try

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In my case I changed the network to a much stronger one and npm install worked perfectly:

npm cache clean --force

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Instead of clearing the cache you can set a temporary folder:

npm install --cache /tmp/empty-cache

or

npm install --global --cache /tmp/empty-cache

As of npm@5, the npm cache self-heals from corruption issues and data extracted from the cache is guaranteed to be valid. If you want to make sure everything is consistent, use npm cache verify instead. On the other hand, if you're debugging an issue with the installer, you can use npm install --cache /tmp/empty-cache to use a temporary cache instead of nuking the actual one.

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For me I had to clone my branch again and do npm install

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You can use yarn package manager instead of npm.

It solved this problem for me

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I've faced this issue and I tried all the answers on Stackoverflow but not worked for me, finally I found solution for this issue:

First of all you have to uninstall nodejs and remove all the files related him

Go to "Register Editor" and search for all "nodejs", "node.js" and delete them

Restart your computer

And reinstall nodejs then install angular.

It's worked for me

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These commands worked for me

sudo npm cache clean --force

sudo npm cache verify

sudo npm i npm@latest -g

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Try setting

npm config set strict-ssl false

and then try running,

npm install -g @angular/cli

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