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First of all, YES, I did my research. I wen't through suggested 'Similar questions' here on stackoverflow and I googled two days in a row. I wasn't able to fix this problem yet.

The problem:

On my new PC I recently installed node.js, typescript and Angular.

I created a new project (let's call the app reminder) like so

ng new reminder --style scss --prefix rem --routing

Immediately I try to run it, just to make sure it works

ng serve

And this is what I get back

An unhandled exception occurred: Could not find the implementation for builder @angular-devkit/build-angular:dev-server

I've been looking for a solution since the day before yesterday - I tried to install the devkit/build-angular dev-server manually. I also tried multiple other things I found, but neither worked so far...

Any ideas, anybody?

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.9
@angular-devkit/build-angular     0.13.9
@angular-devkit/build-optimizer   0.13.9
@angular-devkit/build-webpack     0.13.9
@angular-devkit/core              7.3.9
@angular-devkit/schematics        8.1.0
@angular/cli                      8.1.0
@ngtools/webpack                  7.3.9
@schematics/angular               8.1.0
@schematics/update                0.801.0
rxjs                              6.3.3
typescript                        3.2.4
webpack                           4.29.0

THESE ARE JUST A FEW THINGS AMONG EVERYTHING I TRIED AND DIDN'T WORK:

// reinstall angular cli
npm uninstall -g @angular/cli
npm cache clean --force
npm install -g @angular/cli


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


// reinstalled everything
uninstalled angular
uninstalled typescript
removed node
installed fresh node from nodejs.org
npm cache clean --force
npm chache verify
npm install @angular/cli --global

UPDATE: I uninstalled angular/cli 8 and installed angular/cli 7.3.5 back as it was. Now the server works. I'll wait for an answer to this question.

pax
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  • Assuming that the something might have left. I think it would be better if you put what you have tried. – Bijay Yadav Jul 05 '19 at 12:05
  • Did you try this one: https://stackoverflow.com/a/56873555/3371440 – youri Jul 05 '19 at 12:07
  • npm install --save-dev @angular-devkit/build-angular – Flash Jul 05 '19 at 12:08
  • @Flash `@angular-devkit` is required by `@angular/cli`, no need to install it manually if `@angular/cli` is correctly installed. – youri Jul 05 '19 at 12:09
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    Possible duplicate of [@angular-devkit/core module not found after angular-cli global fresh install](https://stackoverflow.com/questions/56772483/angular-devkit-core-module-not-found-after-angular-cli-global-fresh-install) – youri Jul 05 '19 at 12:11
  • reinstall angular/cli and it will work – Asad Shakeel Jul 05 '19 at 12:26

3 Answers3

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Try this (source):

$ npm uninstall -g @angular/cli
$ npm cache clean
$ npm install -g @angular/cli

Install @angular-devkit/build-angular as dev dependency. This package is newly introduced in Angular 6.0

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

or,

yarn add @angular-devkit/build-angular --dev
Wai Ha Lee
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Chanaka Weerasinghe
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1

I struggled with this for over a week, but none of the suggested (or googled) solutions worked.

I ended up 'reseting' my PC: settings -> recovery -> reset this PC

After clean Windows, npm and Angular installs everything works.

pax
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0

Can you tell which version of node and angular cli you have installed? You can find this by typing on a console:

node --version
ng --version

What do you mean by installing typescript? That's not required. All you have to do is install NodeJS and Angular CLI globally.

You could try to generate a default project, just to check your setup. The instructions can be found on the Angular website: https://angular.io/guide/setup-local

Daniel Grabowski
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