title: navbar toggle is not working when providing proper dependencies in angular?
body: <p>I have been trying to work on Navbar with collapse menu and dropdown link using Bootstrap 4 and Angular 6 but somehow Navbar is not working at all. I can see elements correctly but they don't function as intended.</p>
  
  <p>I installed Bootstrap via Angular CLI using 'ng install bootstrap' and Bootstrap dependencies: <code>ng install jquery</code> and <code>ng install popper.js</code></p>
  
  <p>I also included Bootstrap, jquery and popper.js in package.json and angular.json</p>
  
  <p><strong>package.json</strong></p>
  
  <pre><code>{
    "name": "mean-course",
    "version": "0.0.0",
    "scripts": {
      "ng": "ng",
      "start": "ng serve",
      "build": "ng build",
      "test": "ng test",
      "lint": "ng lint",
      "e2e": "ng e2e",
      "start:server": "nodemon ./backend/server.js"
    },
    "private": true,
    "dependencies": {
      "@angular/animations": "^8.2.14",
      "@angular/cdk": "~8.2.3",
      "@angular/common": "~8.2.4",
      "@angular/compiler": "~8.2.4",
      "@angular/core": "~8.2.4",
      "@angular/forms": "~8.2.4",
      "@angular/http": "^7.2.16",
      "@angular/material": "^8.2.3",
      "@angular/platform-browser": "~8.2.4",
      "@angular/platform-browser-dynamic": "~8.2.4",
      "@angular/router": "~8.2.4",
      "@ng-bootstrap/ng-bootstrap": "^5.1.5",
      "angular-jwt": "^0.1.11",
      "animate.css": "^3.7.2",
      "bcrypt": "^2.0.1",
      "bcryptjs": "^2.4.3",
      "bootstrap": "^4.4.1",
      "compression": "^1.7.4",
      "express": "^4.17.1",
      "hammerjs": "^2.0.8",
      "helmet": "^3.21.2",
      "jquery": "^3.4.1",
      "jsonwebtoken": "^8.0.1",
      "jwt-decode": "^2.2.0",
      "mongoose": "^5.7.12",
      "mongoose-unique-validator": "^2.0.3",
      "ngx-bootstrap": "^5.2.0",
      "ngx-toastr": "^11.2.1",
      "nodemon": "^2.0.1",
      "popper.js": "^1.14.3",
      "rxjs": "~6.4.0",
      "tslib": "^1.10.0",
      "zone.js": "~0.9.1"
    },
    "devDependencies": {
      "@angular-devkit/build-angular": "~0.803.3",
      "@angular/cli": "~8.3.3",
      "@angular/compiler-cli": "~8.2.4",
      "@angular/language-service": "~8.2.4",
      "@types/node": "~8.9.4",
      "@types/jasmine": "~3.3.8",
      "@types/jasminewd2": "~2.0.3",
      "codelyzer": "^5.0.0",
      "jasmine-core": "~3.4.0",
      "jasmine-spec-reporter": "~4.2.1",
      "karma": "~4.1.0",
      "karma-chrome-launcher": "~2.2.0",
      "karma-coverage-istanbul-reporter": "~2.0.1",
      "karma-jasmine": "~2.0.1",
      "karma-jasmine-html-reporter": "^1.4.0",
      "protractor": "~5.4.0",
      "ts-node": "~7.0.0",
      "tslint": "~5.15.0",
      "typescript": "~3.5.3"
    }
  }
  </code></pre>
  
  <p><strong>angular.json</strong></p>
  
  <pre><code>{
    "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
    "version": 1,
    "newProjectRoot": "projects",
    "projects": {
      "mean-course": {
        "projectType": "application",
        "schematics": {},
        "root": "",
        "sourceRoot": "src",
        "prefix": "app",
        "architect": {
          "build": {
            "builder": "@angular-devkit/build-angular:browser",
            "options": {
              "outputPath": "Backend/dist/",
              "index": "src/index.html",
              "main": "src/main.ts",
              "polyfills": "src/polyfills.ts",
              "tsConfig": "tsconfig.app.json",
              "aot": false,
              "assets": [
                "src/favicon.ico",
                "src/assets"
              ],
              "styles": [
                "./node_modules/@angular/material/prebuilt-themes/deeppurple-amber.css",
                "./node_modules/animate.css/animate.min.css",
                "node_modules/ngx-toastr/toastr.css",
                "node_modules/bootstrap/dist/css/bootstrap.min.css",
                "src/styles.css"
              ],
              "scripts": [
                "node_modules/jquery/dist/jquery.min.js",
                "node_modules/popper.js/dist/umd/popper.min.js",
                "node_modules/popper.js/dist/popper.min.js",
                "node_modules/bootstrap/dist/js/bootstrap.min.js"
              ]
            },
            "configurations": {
              "production": {
                "fileReplacements": [
                  {
                    "replace": "src/environments/environment.ts",
                    "with": "src/environments/environment.prod.ts"
                  }
                ],
                "optimization": true,
                "outputHashing": "all",
                "sourceMap": false,
                "extractCss": true,
                "namedChunks": false,
                "aot": true,
                "extractLicenses": true,
                "vendorChunk": false,
                "buildOptimizer": true,
                "budgets": [
                  {
                    "type": "initial",
                    "maximumWarning": "2mb",
                    "maximumError": "5mb"
                  },
                  {
                    "type": "anyComponentStyle",
                    "maximumWarning": "6kb",
                    "maximumError": "10kb"
                  }
                ]
              }
            }
          },
          "serve": {
            "builder": "@angular-devkit/build-angular:dev-server",
            "options": {
              "browserTarget": "mean-course:build"
            },
            "configurations": {
              "production": {
                "browserTarget": "mean-course:build:production"
              }
            }
          },
          "extract-i18n": {
            "builder": "@angular-devkit/build-angular:extract-i18n",
            "options": {
              "browserTarget": "mean-course:build"
            }
          },
          "test": {
            "builder": "@angular-devkit/build-angular:karma",
            "options": {
              "main": "src/test.ts",
              "polyfills": "src/polyfills.ts",
              "tsConfig": "tsconfig.spec.json",
              "karmaConfig": "karma.conf.js",
              "assets": [
                "src/favicon.ico",
                "src/assets"
              ],
              "styles": [
                "./node_modules/@angular/material/prebuilt-themes/deeppurple-amber.css",
                "./node_modules/animate.css/animate.min.css",
                "node_modules/bootstrap/dist/css/bootstrap.min.css",
                "src/styles.css"
              ],
              "scripts": [
                "node_modules/jquery/dist/jquery.min.js",
                "node_modules/popper.js/dist/umd/popper.min.js",
                "node_modules/popper.js/dist/popper.min.js",
                "node_modules/bootstrap/dist/js/bootstrap.min.js"
              ]
            }
          },
          "lint": {
            "builder": "@angular-devkit/build-angular:tslint",
            "options": {
              "tsConfig": [
                "tsconfig.app.json",
                "tsconfig.spec.json",
                "e2e/tsconfig.json"
              ],
              "exclude": [
                "**/node_modules/**"
              ]
            }
          },
          "e2e": {
            "builder": "@angular-devkit/build-angular:protractor",
            "options": {
              "protractorConfig": "e2e/protractor.conf.js",
              "devServerTarget": "mean-course:serve"
            },
            "configurations": {
              "production": {
                "devServerTarget": "mean-course:serve:production"
              }
            }
          }
        }
      }
    },
    "defaultProject": "mean-course"
  }
  </code></pre>