Callback was already called angular cli

Question

I updated my angular-cli then i got error in ng serve

 Callback was already called.
at throwError (node_modules\\neo-async\\async.js:14:11)
at node_modules\\neo-         


        

Answer 1

I encountered this problem when trying to add lazy load feature in Angular 8.

├─┬ @angular-devkit/build-angular@0.803.29
| └── webpack@4.39.2 
└── webpack@4.41.1 

I tried to update @angular-devkit/build-angular to latest but was not working. Many new issues surfaced. When I removed webpack@4.41.1, the same problem 'cannot find module webpack'. So I tried to make the webpack versions same. Used 'npm install webpack@4.39.2'. Finally the problem was solved. When I type 'npm ls webpack', only one webpack is shown and the build works fine.

`-- @angular-devkit/build-angular@0.803.29
  `-- webpack@4.39.2