Could not find the implementation for builder @angular-devkit/build-angular:dev-server
Issue Description
Angular build command gives below error,
Could not find the implementation for builder @angular-devkit/build-angular:dev-server
Resolution
This is how I was able to fix these issues and was able to build an Angular app on the latest CLI.
Steps to fix all issues
- Install devkit and builder package
npm i @angular-devkit/build-angular
It’s preferred to uninstall the version first using the below commands and retry installing the pacakge,
npm uninstall @angular-devkit/build-angular
For any error with the above command please visit below error checklist
- Run ng update command to get a list of all dependencies required to be upgraded.
ng update
- Upgrade the angular core packages as listed above, you may find more packages in the list depending on app complexities.
ng update @angular/cli @angular/core
OR
ng update @angular/cli @angular/core --allow-dirty --force
- Build the app using ng build
ng build
Finally, the build is successful.
For any issue if still surfacing, you may try deleting node_module folder manually or using below command and performing above steps again.
npm rm -rf node_modules
Other references:
That’s all! Happy coding!
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