I have cloned an existing angular project. I did ng serve and the application is running fine. I wanted to install signalR package. I have executed
npm install @aspnet/signalr –-save
The package is installed successfully. But then when I run ng serve, the project has failed to compile with errors
ERROR in ./src/app/PackageAdd.component.ts
Module not found: Error: Can't resolve 'json-diff' in 'C:\Users\Web\src\app\components'
ERROR in ./src/app/components/Update.modal.ts
Module not found: Error: Can't resolve 'json-diff' in 'C:\Users\Web\src\app\components'
ERROR in ./src/app/components/CreateEdit.component.ts
So I wanted to revert back to the initial state and tried to uninstall the package. I tried with
npm uninstall @aspnet/signalr
and then did ng serve but still see the same errors. I am not sure what to do now. How do I revert back to the initial state where the application is getting compiled successfully and running.
This doesn't seem to be an error from Signalr. From the error you've provivded, I'm guessing there's a json-diff npm package being used in your project (look in package.json for it).
If it's not supposed to be there (check the original code), remove the code related to json-diff from the Update.modal.ts and CreateEdit.component.ts files.
If it's supposed to be there, make sure it's listed in package.json (otherwise, install it). If it's already installed, delete the package-lock.json file and the node_modules folder, and run npm install again.
If everything fails, and you just want to revert to the original branch code, run git clean -fd && git reset --hard (WARNING: this will remove all un-pushed local changes that you had done to the branch as well as new files that are not tracked by git). Confirm that the package-lock.json and node_modules folder are deleted in your project, and run npm install