Angular : An unhandled exception occurred: Cannot find module 'webpack/lib/ParserHelpers'

user_4981368 0
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I want to do an upgrade from Angular 7 to 8. I have installed @angular-devkit/build-angular@0.800.0, uninstalled et reinstalled node modules, but I always got this problem : Cannot find module 'webpack/lib/ParserHelpers' When I did npm fix audit I got another type of error which is : An unhandled exception occurred: Job name "..getProjectMetadata" does not exist. See "C:\Users\Surface\AppData\Local\Temp\ng-urmmUP\angular-errors.log" for further details.enter image description here

node-modules angular-material angular
4 Answers

First of all, make sure that NPM is up-to-date.

npm i -g npm

Check version of Webpack. The version 5 (and after) is not currently supported by @angular-devkit/build-angular@0.8XX.X (source).

Clean all :

remove node_modules folder and package-lock.json file

rm package-lock.json && rm -R node_modules

remove dist folder

Clear npm cache :

npm cache clean --force

To see which version are installed :

npm ls webpack

How to resolve ?

npm uninstall webpack
npm install --save-dev webpack@4.39.2
user_29718200

In my case it has been solved

  1. npm audit fix / sudo npm audit fix (ubuntu)

  2. Adding the following code in tsconfig.json "angularCompilerOptions": { "enableIvy": false }

user_114358840
user_8378850

You Should check your webpack version in Package-lock.json and package.json

user_133569000
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