Could not find module "@angular-devkit/build-angular"

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

---

npm update

It worked like a charm.

---

for angular 6 and above

The working solution for me was

npm install

ng update

and finally

npm update

---

Need to explicitly get devDependencies.

npm i --only=dev

---

If the following command does not work,

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

then move to the project folder and run this command:

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

---

I fixed mine by:

Delete node_modules folder. run npm install

Hope this helped!

---

Please follow these 5 steps,it's worked definitely. (My personal experience)

Step 1: npm uninstall -g @angular/cli

Step 2: npm cache clean --force

Step 3: npm install -g @angular/cli@latest

Step 4: npm i

Step 5: ng build

After that ng serve .I hope definitely your problem will be solved.

---

All of the above answer are correct but they did not work for me. The only way I was able to make this work was by follow steps/commands:

npm uninstall -g @angular/cli@6.0.8
npm cache clean --force
npm install -g @angular/cli@latest
npm install node-sass -g
ng new MY_PROJECT_NAME
cp -r from_my_old_project to_new_MY_PROJECT_NAME

---

For Angular 8

Install npm-check-updates package

Run:

$ npm i npm-check-updates
$ ncu -u
$ npm install

This package will update all packages and resolve this issue

Notice: After update If you face this issue:

ERROR in The Angular Compiler requires TypeScript >=3.4.0 and <3.6.0 but 3.6.3 was found instead.

then run:

$ npm install typescript@3.5.3

Source Link

---

npm install Just type npm install and run.Then the project will run without errors. Or you can use npm install --save-dev @angular-devkit/build-angular

---

Try this one.

npm install

npm update

if it's shows something like this. 

run npm audit fix to fix them, or npm audit for details

Do that!

---

The following worked for me. Nothing else did, unfortunately.

npm uninstall @angular-devkit/build-angular
npm install @angular-devkit/build-angular
ng update --all --allow-dirty --force

---

Following commands works:

npm install
ng update

-You may see the message "We analyzed your package.json and everything seems to be in order. Good work!"

npm update

Then try dev build

ng build 

I got the error with type script, downgraded to

npm install typescript@">=3.1.1 <3.2

ng build --prod 

All success with prod build.

Below is the working combination

ng --version

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.11.0
@angular-devkit/build-angular     0.11.0
@angular-devkit/build-optimizer   0.11.0
@angular-devkit/build-webpack     0.11.0
@angular-devkit/core              7.1.0
@angular-devkit/schematics        7.1.0
@angular/cli                      7.1.0
@ngtools/webpack                  7.1.0
@schematics/angular               7.1.0
@schematics/update                0.11.0
rxjs                              6.3.3
typescript                        3.1.6
webpack                           4.23.1

---

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

solved it for me.

---

First delete node_modules folder

then Restart system

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

and

Run npm install

---

When we run commands like ng serve, it uses the local version of @angular/cli. So first install latest version of @angular/cli locally (without the -g flag). Then update the cli using ng update @angular/cli command. I thing this should fix the issue. Thanks

This link may help you if you are updating your angular project https://update.angular.io/

---

This error generally occurs when the angular project was not configure completely.

This will work

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

npm install

---

Just execute the following command and error was solved

ng update @angular/cli @angular/core

npm uninstall @angular-devkit/build-angular

npm install --save-dev @angular-devkit/build-angular if this error could not resolve by above command so you update node version npm update npm -g

npm update npm -g

---

working solution for me

Delete node_modules folder.

run npm install

Hope this will work!

---

I struggled with the same problem just a minute ago. My project was generated using the v 1.6.0 of angular-cli.

1. npm update -g @angular/cli

2. editing my package.json changing the line
    "@angular/cli": "1.6.0",
      to
    "@angular/cli": "^1.6.0",

3. npm update

I hope my help is effective ツ

---

Try this first

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

If some error come again for missing packages try

npm install

---

That's works for me, commit and then:

ng update @angular/cli @angular/core
npm install --save-dev @angular/cli@latest

---

I had the same problem today, after upgrading node from v9 to v10. My environment is set by docker and I had to remove this command from the my DockerFile :

npm link @angular/cli

It creates a symlink to the directory where node is installed.
I guess the angular/cli module in it do not have the same version as the one in the node_modules dir of my project, and this causes the issue.

---

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

This code install @angular-devkit/build-angular as dev dependency.

100% TESTED.

---

Just update the angular version and add the below dependency:

ng update

npm update

npm i @angular-devkit/build-angular

https://www.npmjs.com/package/@angular-devkit/build-angular

---

I had a library which I created in an older version of Angular.

Now that I upgraded to the latest version 11 the build would fail.

Indeed, the builder has changed.

When doing an ng build I was something a somewhat similar error message:

Cannot find module '@angular-devkit/build-ng-packagr/package.json'

In the angular.json file I had to change the builder property:

"builder": "@angular-devkit/build-ng-packagr:build",

with:

"builder": "@angular-devkit/build-angular:ng-packagr",

---

go to the folder where u created the angular project and the delete the node_modules folder. Now open the command prompt and enter in the project which u want to run using cd. Enter the command

npm i
OR
npm install

Now the command prompt will start installing the new node_modules files in the project. When the node_modules gets installed then, run the project using command

ng s --o

If the above method not worked then their is some mismatch of the version in npm and then try to install the node_modules.

npm update

Generally this method should work if not worked then try to run this command:

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

Details and alternative solution https://learnprogramo.com/could-not-find-module-angular-devkit-build-angular-resolved/

---

Delete the node_modules.

Clear the cache using npm cache clean --verify.

And then npm install again.

Works like a charm for me.

---

I faced the same problem.

Surprisingly, it was just because the version specified in package.json was not in the expected format.

I switched from version "version": "0.1" to "version": "0.0.1" and it solved the problem.

Angular NEEDS semantic versioning (also read Semver) with three parts.

---

I am facing the same issue since 2 days.

ng -v :6.0.8
node -v :8.11.2
npm -v :6.1.0

Make sure you are in the folder where angular.json is installed. Get into that and type ng serve. If the issue still arises, then you are having only dependencies installed in node_modules. Type the following, and it will work:

npm i --only=dev

---