Cannot find module 'webpack' - Angular

Question

I just migrated my project from angular v5.x to v6.x and now when I try to start it with ng serve I\'m getting:

Cannot find module \'webpack\'
E         


        

Answer 1

Try to see if this works...

npm uninstall --save webpack
npm install --save-dev webpack

Answer 2

This error mostly occurs because of old dependencies, if at all are not upgraded then it can be deleted manually by deleting the node_modules Folder and also the package-lock.json file

after that you can clean the Cache (if at all necessary) and then

npm cache clean --force
npm install

Answer 3

I fixed this issue with:

delete package-lock.json
delete node_modules
delete dist (if exist)

npm cache clean --force

npm install

Answer 4

I had the same issue and this worked for me:

1. Delete these files/ folders (from your Angular root folder):
   

   • package-lock.json (Not the package.json)
   • /node_modules folder
   • /dist folder

2. Execute command (regenerate the package-lock.json and the /node_modules):
   

   • $npm install
     

Everything should work now, it was the package-lock.json that caused npm to download old versions of dependencies.