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

问题

I'm trying to run a command at npm start, but I get the message: "You seem to be not dependent on" @angular/core ". This is an error. What could be the reason? As it writes in the console: npm @angular/core -v it gets 5.4.2

My package.json

"dependencies": {
"@angular/animations": "^4.4.3",
"@angular/common": "^4.4.3",
"@angular/compiler": "^4.4.3",
"@angular/core": "^4.4.3",
"@angular/forms": "^4.4.3",
"@angular/http": "^4.4.3",
"@angular/platform-browser": "^4.4.3",
"@angular/platform-browser-dynamic": "^4.4.3",
"@angular/router": "^4.4.3",
"applicationinsights-js": "^1.0.12",
"core-js": "^2.4.1",
"date-fns": "^1.28.5",
"deepmerge": "^1.5.1",
"fingerprintjs2": "^1.5.1",
"ng2-page-scroll": "^4.0.0-beta.9",
"ngx-mydatepicker": "2.1.2",
"rxjs": "^5.1.0",
"zone.js": "^0.8.12"
},
"devDependencies": {
"@angular/cli": "^1.4.2",
"@angular/compiler-cli": "^4.4.3",
"@angular/language-service": "^4.4.3",
"@types/applicationinsights-js": "^1.0.4",
"@types/deepmerge": "^1.3.2",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@types/node": "~6.0.60",
"codelyzer": "~3.0.1",
"gulp": "^3.9.1",
"gulp-deploy-git": "^0.5.3",
"gulp-replace": "^0.6.1",
"husky": "^0.14.3",
"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",
"lint-staged": "^4.0.3",
"prettier": "^1.5.3",
"protractor": "^5.1.2",
"run-sequence": "^2.1.0",
"ts-node": "~3.2.0",
"tslint": "~5.7.0",
"typescript": "^2.5.2"
}

回答1:

I encountered the same issue to resolve this all you need to do is to

cd <project_name>

and then run the following command:

npm update

and than the project will be succesfully compiled.

回答2:

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

Keep trying, good luck :)

回答3:

Try to remove node_modules folder, package-lock.json file and then run:

npm cache clean --force
npm cache verify
npm i

回答4:

This error occurred in my case when my node_modules folder is empty otherwise it will have bunch of folders inside. I used the "ng link" command to work it out.

My project name is Pipes, and my command prompt looks like this:

Pipes$ npm link

And finally you can execute ng serve to check it out

回答5:

You need to remove ^ this, because something its get that version where the others files are effecting due to this version,

so always use the specific version in angular.

or you can use the following package.json here:

{
  "name": "artist-booking-app",
  "version": "0.0.0",
  "license": "MIT",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@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",
    "angular2-toaster": "^4.0.1",
    "bootstrap": "3.3.7",
    "core-js": "2.4.1",
    "jquery": "3.2.1",
    "ng2-scroll-to-el": "^1.0.0",

    "primeng": "^4.1.3",
    "rxjs": "5.4.1",
    "zone.js": "0.8.14"
  },
  "devDependencies": {
    "@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/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"
  }
}

来源：https://stackoverflow.com/questions/46452956/you-seem-to-not-be-depending-on-angular-core-typescript