Cannot find module '@angular-devkit/core'

Question

I have created a angular project with Angular CLI: 1.6.3 Node: 9.4.0 OS: linux x64 version. But when want to run my angular app with command ng serve then fetch this error

Cannot find module '@angular-devkit/core'.

score 101 · Answer 1 · edited Jun 22 '18 at 04:09

101

Try the following steps,

Step 1:

npm update -g @angular/cli

Step 2:

Edit your package.json changing the line

"@angular/cli": "1.6.0",

to

"@angular/cli": "^1.6.0",

STEP 3:

npm update

Refer the steps

edited Jun 22 '18 at 04:09

Shashank Vivek

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answered Jan 23 '18 at 04:02

Sajeetharan

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8

This helped me, +1 for that. But could you also add information on what these are solving? – Aragorn Jan 26 '18 at 15:27
I had to clear out node_modules, and do a fresh install using npm install, after updating the version to "^1.6.0". – Sudhir Mar 08 '18 at 14:01
1

I would give +1 if there'd be any explanation as to the cause of this. Freaking ridiculous to get compilation error on a fresh new project... – cah1r Mar 15 '18 at 17:19
im not sure what explanation to provide! the commands are self explanatory and it was a bug which is fixed afaik – Sajeetharan Mar 15 '18 at 17:24

score 28 · Answer 2 · answered Jan 25 '18 at 18:06

28

try this out

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

https://github.com/angular/devkit/issues/256

try to update your angular cli

https://github.com/angular/angular-cli/issues/9307

answered Jan 25 '18 at 18:06

inyee

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score 26 · Answer 3 · edited Jan 23 '18 at 07:08

26

Step1: Edit your package.json changing the line

@angular/cli": "1.6.4"

to

@angular/cli": "^1.6.4"

Step2:

npm update -g @angular/cli

Step3:

npm install --save-dev @angular/cli@latest

I was facing the exact same problem. These three did the tasks for me. You may like to see https://github.com/angular/angular-cli/issues/9307

edited Jan 23 '18 at 07:08

Pieter

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answered Jan 23 '18 at 06:42

krishna murari

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I used "npm update -g @angular/cli@latest" then "npm install --save-dev @angular/cli@latest", after that, the error disappear – IcyBrk Jan 27 '18 at 16:23
1

Sorry, mistakes made, the command I actually used was "npm install -g @angular/cli@latest" then "npm install --save-dev @angular/cli@latest" – IcyBrk Jan 27 '18 at 19:20

alexKhymenko · Answer 4 · 2018-05-15T09:57:07.823

24

This can happen on different versions on angular-cli. You can install it manually with

 npm i -D @angular-devkit/core

-D is shortcut to --save-dev

Or try the latest version of angular cli

npm install --save-dev @angular/cli@latest

edited May 15 '18 at 09:57

answered Jan 23 '18 at 04:01

alexKhymenko

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This combined with running npm install again, worked for me! – onmyway Jan 23 '18 at 05:18

hoogw · Answer 5 · 2018-01-23T17:29:36.017

package.json, change to "@angular/cli": "^1.6.5",

 "devDependencies": {
"@angular/cli": "^1.6.5",
"@angular/compiler-cli": "^5.0.0",

Important, the version could be vary depends on what time.

You really should run

 npm update -g @angular/cli

first, to get version, my is 1.6.5

What does the "^" do?

 ~1.0.2 means to install version 1.0.2 or the latest patch version such as 1.0.4. 

  ^1.0.2 means to install version 1.0.2 or the latest minor or patch version such as 1.1.0.

last, run this

   npm update

score 1 · Answer 6 · edited Apr 14 '18 at 01:33

1

Just run:

npm install --save-dev @angular/cli@latest

In the project folder, to fix it.

edited Apr 14 '18 at 01:33

Stephen Rauch

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answered Apr 14 '18 at 01:12

JMck

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score 1 · Answer 7 · answered Jul 19 '21 at 14:24

1

I did it by deleting package-lock.json and the node_modules folder. After that run "npm install" and start the application again.

answered Jul 19 '21 at 14:24

Ramon-Alexandru Salagean

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score 0 · Answer 8 · answered Jan 24 '18 at 13:19

0

You can do

First,

Delete the node_modules folder

Run npm install

And add devkit to your dev dependancies with npm i -D @angular-devkit/core

answered Jan 24 '18 at 13:19

Tolotra Raharison

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score 0 · Answer 9 · answered Feb 13 '18 at 12:08

0

Step 1: delete package-lock.json Step 2: npm update -g @angular/cli Step 3: update @angular/cli new version in package.json Step 4: npm install

It worked for me.

answered Feb 13 '18 at 12:08

Arvind Mehta

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score 0 · Answer 10 · answered Feb 16 '18 at 00:48

0

I only installed my angular/cli using:
npm install -g @angular/cli@1.5.2
And I started getting this error.

Solution:
If your version is global and
If you don't mind the version of your angular/cli then type:
npm update -g @angular/cli

answered Feb 16 '18 at 00:48

danilo

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score 0 · Answer 11 · answered Jan 19 '21 at 09:49

0

for me adding @angular-devkit/core solved the issue

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

answered Jan 19 '21 at 09:49

dasAnderl ausMinga

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score 0 · Answer 12 · answered Mar 18 '21 at 16:29

I had this same error after updating some packages.

In my package.json I had the most current '@angular-devkit/core'

Using the standard solution to many problems:

rm -R node_modules/
npm install

And I updated the @angular/cli

npm install --save-dev @angular/cli@latest

and finally:

npm start

score 0 · Answer 13 · answered Jun 03 '21 at 19:40

0

Only change "@angular/cli": "1.6.4", to "@angular/cli": "^1.6.4", and update npm with: npm update

answered Jun 03 '21 at 19:40

Mojtaba Nava

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Cannot find module '@angular-devkit/core'

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