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我有這個bootstrap導航欄在移動視圖中沒有正確合攏。看看下面的圖片。 
Bootstrap導航欄移動視圖沒有正確合攏
這是我的代碼（它在jsfiddle中運行良好），但在我的角度項目中，它無法正常工作。 的JQuery 3.2.1 & 引導3.3.7
<nav class="navbar navbar-default">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar-collapse-2">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Company Name</a>
</div>
<div class="collapse navbar-collapse" id="navbar-collapse-2">
<ul class="nav navbar-nav navbar-right">
<li><a href="#">Home</a></li>
<li><a href="#">About</a></li>
<li><a href="#">Services</a></li>
<li><a href="#">Works</a></li>
<li><a href="#">News</a></li>
<li><a href="#">Contact</a></li>
</ul>
</div>
</div>
</nav>
這裏也是角cli.json：
...
"apps": [{
"root": "src",
"outDir": "dist",
"assets": [
"assets",
"favicon.ico"
],
"index": "index.html",
"main": "main.ts",
"polyfills": "polyfills.ts",
"test": "test.ts",
"tsconfig": "tsconfig.app.json",
"testTsconfig": "tsconfig.spec.json",
"prefix": "app",
"styles": [
"../node_modules/bootstrap/dist/css/bootstrap.min.css",
"../node_modules/materialize-css/dist/css/materialize.min.css",
"styles.css"
],
"scripts": [
"../node_modules/jquery/dist/jquery.min.js",
"../node_modules/bootstrap/dist/js/bootstrap.min.js",
"../node_modules/materialize-css/dist/js/materialize.min.js"
],
"environmentSource": "environments/environment.ts",
"environments": {
"dev": "environments/environment.ts",
"prod": "environments/environment.prod.ts"
}
}]...