title: Uncaught Error: Cannot find module "tslib"
body: <p>I am testing my angular application and after some success test without changing anything I am getting the following error:</p>
  
  <blockquote>
    <p>HeadlessChrome 68.0.3440 (Mac OS X 10.12.6) ERROR   Uncaught Error:
    Cannot find module "tslib".   at
    <a href="http://localhost:9877/_karma_webpack_/main.js:150" rel="noreferrer">http://localhost:9877/_karma_webpack_/main.js:150</a></p>
  </blockquote>
  
  <p>Does someone have the same problem?</p>
  
  <pre><code>package.json
  {
    "name": "test",
    "version": "0.0.0",
    "scripts": {
      "ng": "ng",
      "start": "cross-env ng serve",
      "start:proxy": "cross-env ng serve --proxy-config proxy.conf.json",
      "mock:server": "json-server --watch data.json",
      "start:ps": "cross-env concurrently --kill-others \"npm run mock:server\" \"npm run start:proxy\"",
      "build": "ng build",
      "test": "ng test --watch=false",
      "test:local:coverage": "ng test --watch=false --codeCoverage",
      "test:local:watch": "ng test --watch=true",
      "lint": "ng lint",
      "e2e": "ng e2e",
      "show:coverage": "http-server -c-1 -o -p 9875 ./coverage",
      "pre-push": "npm run lint &amp;&amp; npm run build &amp;&amp; npm run test"
    },
    "private": true,
    "dependencies": {
      "@angular/animations": "^6.1.4",
      "@angular/cdk": "^6.4.6",
      "@angular/common": "^6.0.3",
      "@angular/compiler": "^6.0.3",
      "@angular/core": "^6.0.3",
      "@angular/forms": "^6.0.3",
      "@angular/http": "^6.0.3",
      "@angular/material": "^6.4.6",
      "@angular/platform-browser": "^6.0.3",
      "@angular/platform-browser-dynamic": "^6.0.3",
      "@angular/router": "^6.0.3",
      "bootstrap": "^4.1.3",
      "core-js": "^2.5.4",
      "font-awesome": "^4.7.0",
      "hammerjs": "^2.0.8",
      "http-server": "^0.11.1",
      "intl": "^1.2.5",
      "normalize.css": "^8.0.0",
      "rxjs": "^6.2.2",
      "rxjs-compat": "^6.2.2",
      "tslib": "^1.9.3",
      "zone.js": "^0.8.26"
    },
    "devDependencies": {
      "@angular/compiler-cli": "^6.0.3",
      "@angular-devkit/build-angular": "~0.6.8",
      "typescript": "~2.7.2",
      "@angular/cli": "~6.0.8",
      "@angular/language-service": "^6.0.3",
      "@types/jasmine": "~2.8.6",
      "@types/jasminewd2": "~2.0.3",
      "@types/node": "~8.9.4",
      "codelyzer": "~4.2.1",
      "jasmine-core": "~2.99.1",
      "concurrently": "^4.0.1",
      "jasmine-spec-reporter": "~4.2.1",
      "karma": "~1.7.1",
      "karma-chrome-launcher": "~2.2.0",
      "karma-coverage-istanbul-reporter": "~2.0.0",
      "karma-jasmine": "~1.1.1",
      "karma-jasmine-html-reporter": "^0.2.2",
      "protractor": "~5.3.0",
      "ts-node": "~5.0.1",
      "tslint": "~5.9.1"
    }
  }
  </code></pre>