[Solved] Could not find the implementation for builder @angular-devkit/build-angular:dev-server

Are You Facing the Following error Could not find the implementation for builder @angular-devkit/build-angular:dev-server in Angular? Then You are in right place. In this article, we will try to figure out how this error occurs and what are the possible fixes for this error. First of all, let’s explore how this error occurs.

What is Could not find the implementation for builder @angular-devkit/build-angular:dev-server error?

I am trying to run ng serve but it fails with the following error.

Could not find the implementation for builder @angular-devkit/build-angular:dev-server
Error: Could not find the implementation for builder @angular-devkit/build-angular:dev-server

How To Fix Could not find the implementation for builder @angular-devkit/build-angular:dev-server Error?

Solution 1: Reinstall build-angular

To Fix Could not find the implementation for builder @angular-devkit/build-angular:dev-server Error You Just need to reinstall build-angular package will resolve this error. First of all Uninstall build-angular package by running this command.

npm uninstall @angular-devkit/build-angular

And now You need to install build-angular by running this command.

npm install --save-dev @angular-devkit/build-angular

Or Run this command.

npm install @angular-devkit/build-angular

and then run ng serve command.

ng serve

Now, Your error must be resolved. Thank You.

Solution 2: Add This in Package.json

First of all Delete your node_modules and package-lock.json by running this command.

rm -rf node_modules
 && rm -f package-lock.json

Now, Clean the Cache by running the following command.

npm cache clean --force

Then open your package.json file and find @angular-devkit/build-angular under devDependencies section. and Change its version to given below.

{
  "devDependencies": {
    "@angular-devkit/build-angular": "^14.2.1",
  }
}

And now run npm install to install all Dependencies.

npm install

and now, your error will be resolved. Thanks.

Solution 3: Update angular-devkit/build-angular

Update your angular-devkit/build-angular to the latest version by running this command.

npm install --save-dev @angular-devkit/build-angular@latest

If the above command fails then use the –force flag just like this.

npm install --save-dev @angular-devkit/build-angular --force

Hope, your issue is resolved now.

Solution 4: Run this command

Run this command.

ng update @angular/cli @angular/core --allow-dirty --force

Conclusion

It’s all About this error. I hope We Have solved Your error. Comment below Your thoughts and your queries. Also, Comment below on which solution worked for you.

Also, Read

• ReferenceError: primordials is not defined
• Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: No “exports” main resolved
• The Angular CLI requires a minimum Node.js version
• Please verify that the package.json has a valid “main” entry
• Module not found: Can’t resolve ‘fs’ in NextJS