“You seem to not be depending on ”@angular/core“.”

问题

When I try to build my project running the following command:

ng build --environment=prod --aot=false  --output-path="..." --base-href="..."

You seem to not be depending on @angular/core.

This is an error, however, I don't understand why because before it worked well.

I tried to do this:

npm install @angular/core

But I get this error :

error at Error (native) error { Error: EACCES: permission denied, chown '' error at Error (native) error errno: -13, error code: 'EACCES', error syscall: 'chown', error Please try running this command again as root/Administrator. verbose exit [ -13, true ]

I also tried to get rid of node_modules, then make an install npm: but I get the same error.

And when I run the following command:

ng serve

I have another error:

The "@angular/compiler-cli" package was not properly installed. Error: Error: Cannot find module '@angular/compiler-cli'

This is my package.json :

"ng": "ng",
"start": "ng serve",
"build": "ng build",
"test": "ng test",
"lint": "ng lint",
"e2e": "ng e2e"

"@angular/animations": "^4.0.0",
"@angular/common": "^4.0.0",
"@angular/compiler": "^4.0.0",
"@angular/core": "^4.0.0",
"@angular/forms": "^4.0.0",
"@angular/http": "^4.0.0",
"@angular/platform-browser": "^4.0.0",
"@angular/platform-browser-dynamic": "^4.0.0",
"@angular/router": "^4.0.0",
"@types/jquery": "^3.2.17",
"cli-color": "^1.2.0",
"core-js": "^2.4.1",
"font-awesome": "^4.7.0",
"jquery": "^3.2.1",
"matrix-js-sdk": "^0.8.5",
"moment": "^2.18.1",
"olm": "https://matrix.org/packages/npm/olm/olm-2.2.2.tgz",
"readline": "^1.3.0",
"rxjs": "^5.4.1",
"socket.io-client": "^2.0.3",
"zone.js": "^0.8.14"

"@angular/cli": "1.2.6",
"@angular/compiler-cli": "^4.0.0",
"@angular/language-service": "^4.0.0",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@types/jquery": "^3.2.17",
"@types/node": "~6.0.60",
"codelyzer": "~3.0.1",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.2.1",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~3.0.4",
"tslint": "~5.3.2",
"typescript": "~2.3.3"

回答1:

Not sure whether below approach will solve your problem or not, please try once.

I have also faced the same issue while executing below command.

D:\My_Project>ng serve

Then I have followed below steps and it worked for me.

D:\My_Project>npm link
D:\My_Project>ng serve

If this is not working kindly let me know I will try to reproduce the error which you are getting and try to give you solution as soon as possible.

回答2:

How to use

Run npm install inside this project folder to install all dependencies.

Make sure you use the latest version of the CLI (upgrade guide below)

Run ng serve to see the app in action (try npm start in case ng serve fails).

How to upgrade the CLI

Run the below commands - only use "sudo" on Mac/ Linux.

sudo npm uninstall -g angular-cli @angular/cli

npm cache clean --force

sudo npm install -g @angular/cli

In case it fails

Delete node_modules folder and package-lock.json file from your project directory Run the below commands in the given order-

npm install

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

npm link

回答3:

I went down the list of installing the various dependencies as prompted in the terminal. I am running on Windows so I also installed windows Build Tools.

I ran ng serve and got "You seem to not be depending on "@angular/core" and/or "rxjs". This is an error."

Then ran

npm link

followed by

ng serve

Everything is now running. Not sure how much of what I did was necessary/redundant but I can now build Angular projects.

回答4:

@Sunil Kumar Sahu is correct.

Using "ng link" means it connects your current application to your root/parent application that you have on your machine. When you run your application, any changes you make to the dependency will be reflected in the application.

After this, just run "ng serve".

Link : https://codurance.com/2016/12/21/how-to-use-npm-link/

Prakhar

回答5:

check if you have node_modules folder on project folder.

回答6:

Faced the same issue and solved by executing the npm link command.

When we run npm link in a module’s root directory, npm creates a symbolic link from our “global node_modules” directory to the local module’s directory

The “global node_modules” directory is a special directory where all modules installed with npm install -g are stored. We can find the path to our global node_modules directory by running npm root -g

Visit :- https://medium.com/@alexishevia/the-magic-behind-npm-link-d94dcb3a81af