Versions of @angular/compiler-cli and typescript could not be determined.

Bug Report or Feature Request (mark with an x)

- [x] bug report -> please search issues before submitting
- [ ] feature request

Versions.

ng 1.5.0 node 8.9.0 npm 5.5.1 yarn 1.3.2 visual studio code 1.17.2

Repro steps.

run ng serve or ng serve -aot

The log given by the failure.

Versions of @angular/compiler-cli and typescript could not be determined. The most common reason for this is a broken npm install.

Please make sure your package.json contains both @angular/compiler-cli and typescript in devDependencies, then delete node_modules and package-lock.json (if you have one) and run npm install again.

Desired functionality.

Mention any other details that might be useful.

here my package.json

{
    "name": "migate",
    "version": "0.1.0",
    "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": "^5.0.0",
        "@angular/common": "^5.0.0",
        "@angular/core": "^5.0.0",
        "@angular/forms": "^5.0.0",
        "@angular/platform-browser": "^5.0.0",
        "@angular/platform-browser-dynamic": "^5.0.0",
        "@angular/router": "^5.0.0",
        "bootstrap": "^4.0.0-beta.2",
        "core-js": "^2.5.1",
        "global": "^4.3.2",
        "jquery": "^3.2.1",
        "json-typescript-mapper": "^1.1.3",
        "popper.js": "^1.12.6",
        "roboto-fontface": "^0.8.0",
        "rxjs": "^5.5.2",
        "typescript-string-operations-ng4": "^0.1.0",
        "zone.js": "^0.8.18"
    },
    "devDependencies": {
        "@angular/cli": "^1.5.0",
        "@angular/compiler": "^5.0.0",
        "@angular/compiler-cli": "^5.0.0",
        "@angular/language-service": "^5.0.0",
        "@types/jasmine": "~2.6.2",
        "@types/jasminewd2": "~2.0.3",
        "@types/node": "~8.0.47",
        "codelyzer": "~4.0.0",
        "jasmine-core": "~2.8.0",
        "jasmine-spec-reporter": "~4.2.1",
        "karma": "~1.7.1",
        "karma-chrome-launcher": "~2.2.0",
        "karma-cli": "~1.0.1",
        "karma-coverage-istanbul-reporter": "^1.3.0",
        "karma-jasmine": "~1.1.0",
        "karma-jasmine-html-reporter": "^0.2.2",
        "protractor": "~5.2.0",
        "ts-node": "~3.3.0",
        "tslint": "~5.8.0",
        "typescript": "~2.4.0",
        "webpack": "^3.8.1",
        "webpack-sources": "^1.0.1"
    }
}

[sudhakar216]

I solved The Issue after 23hrs of research and continues trails

Sollution:

Add the three { “@angular/cli”: “1.5.2”, “@angular/compiler-cli”: “^5.0.0”, “typescript”: “^2.4.2” } in “dependencies” too so these will be installed without error I repeat again make sure the above three are available in “dependencies” and Devdependencies too…

It will work for sure… If you have any doubts mail me or call me

Thank you, everyone…

[Jin-K]

I don’t have NODE_ENV=production and have the same error