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

Even if npm cache clean --force

Try to execute the installing cmd in admin folder.
i.e C:\Users\admin
This worked out for me.

Answer 2

I resolved my problem with this one liner

npm cache clean --force

It works like a charm all the time. I love one liners. Note: since its a clean install, I had no concerns emptying npm cache.

Answer 3

Simple solutions:

npm cache clean --force
npm install 

Answer 4

I solved that by first cleaning the cache using

npm cache clean --force

Then

npm install -g @angular/cli

Answer 5

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.

Answer 6

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