NPM Install Error:Unexpected end of JSON input while parsing near '…nt-webpack-plugin“:”0'

Question

When Creating a new Angular 5 project:

node version: 8.9.2

npm version: 5.5.1

My Command is

npm install -g @angular/cli

Answer 1

This happens something due to cache or outdated version of Node Package Manager i just updated my NPM it works fine here is command to update Npm to latest version

npm i npm@latest -g

after updating NPM run your desired command

Answer 2

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

Answer 3

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

Answer 4

If

npm cache clean --force

doesn't work. try

npm cache clean --force
npm update

Answer 5

You can use yarn package manager instead of npm.

It solved this problem for me

Answer 6

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