NPM Install Error:Unexpected end of JSON input while parsing near '...nt-webpack-plugin":"0'
Solution 1
This solved it for me:
Open Windows Powershell as admin
npm cache clean --force
npm install -g @angular/cli
Solution 2
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:
That's a problem related to npm, it's about the cache that get corrupt. Even though in newer versions of npm they implemented self healing, which normally guarantee no corruption, but it seem it's not that efficient. Forcing clean cache resolve the problem.
The error happen when parsing one of the cache files, which have a json format. The cache is found at ~/.npm/_cacache (in linux) and %AppData%/npm-cache (windows). For my current npm version and when i checked, there was three directories.
if you check the first or the second, the structure is as follow
And each cache file have a json format (and that what get parsed)
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.
Solution 3
If
npm cache clean --force
doesn't work. try
npm cache clean --force
npm update
Solution 4
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
Solution 5
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
kathir
Updated on July 27, 2022Comments
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kathir almost 2 years
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
The Error is:
npm ERR! **Unexpected end of JSON input while parsing near '...nt-webpack-plugin":"0'** npm ERR! A complete log of this run can be found in: npm ERR! C:\Users\Aashitec\AppData\Roaming\npm-cache\_logs\2017-12-06T13_10_10_729Z-debug.log