我一直在尝试使用 Bootstrap 4.1.1 和 Angular 6 在带有折叠菜单和下拉链接的导航栏上工作，但不知何故，导航栏根本不起作用。我可以正确看到元素，但它们没有按预期运行。
我使用'ng install bootstrap --save'和Bootstrap依赖项通过Angular CLI安装了Bootstrap：'ng install jquery --save'和'ng install popper.js --save'
我还在 package.json 和 angular.json 中包含了 Bootstrap、jquery 和 popper.js
包.json：
"dependencies": {
"@angular/animations": "^6.0.0",
"@angular/common": "^6.0.0",
"@angular/compiler": "^6.0.0",
"@angular/core": "^6.0.0",
"@angular/forms": "^6.0.0",
"@angular/http": "^6.0.0",
"@angular/platform-browser": "^6.0.0",
"@angular/platform-browser-dynamic": "^6.0.0",
"@angular/router": "^6.0.0",
"bootstrap": "^4.1.1",
"core-js": "^2.5.4",
"jquery": "^3.3.1",
"popper.js": "^1.14.3",
"rxjs": "^6.0.0",
"zone.js": "^0.8.26"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.6.0",
"@angular/cli": "~6.0.0",
"@angular/compiler-cli": "^6.0.0",
"@angular/language-service": "^6.0.0",
"@types/jasmine": "~2.8.6",
"@types/jasminewd2": "~2.0.3",
"@types/jquery": "^3.3.2",
"@types/node": "~8.9.4",
"codelyzer": "~4.2.1",
"jasmine-core": "~2.99.1",
"jasmine-spec-reporter": "~4.2.1",
"karma": "~1.7.1",
"karma-chrome-launcher": "~2.2.0",
"karma-coverage-istanbul-reporter": "~1.4.2",
"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",
"typescript": "~2.7.2"
}
角.json：
"styles": [
"./node_modules/bootstrap/dist/css/bootstrap.min.css",
"src/styles.css"
],
"scripts": [
"./node_modules/jquery/dist/jquery.min.js",
"./node_modules/popper.js/dist/popper.min.js",
"./node_modules/bootstrap/dist/js/bootstrap.min.js"
]
html:
<nav class="navbar navbar-expand-md navbar-light bg-light">
<a href="#" class="navbar-brand">RecipeBook</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsing-nav-bar" aria-controls="collapsing-nav-bar"
aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="collapsing-nav-bar">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a href="#" class="nav-link">Recipes</a>
</li>
<li class="nav-item">
<a href="#" class="nav-link">Shopping list</a>
</li>
</ul>
<ul class="navbar-nav">
<li class="nav-item dropdown">
<a href="#" class="nav-link dropdown-toggle" id="dropdownMenu" data-toggle="dropdown"
aria-haspopup="true" aria-expanded="false">
Manage
</a>
<div class="dropdown-menu" aria-labelledby="dropdownMenu">
<a href="#" class="dropdown-item">Save</a>
<a href="#" class="dropdown-item">Fetch</a>
</div>
</li>
</ul>
</div>
</nav>
我更喜欢使用 Bootstrap 本机库，我宁愿不使用 ng-bootstrap 也不喜欢在 head-tag 中包含 CDN 之类的技巧。
我在这里做错了吗？任何有关如何解决此问题的建议将不胜感激。