drop down menu - Bootstrap dropdown with Angular 6

Question

I'm trying to create a dropdown item in a Bootstrap navbar using Angular 6. My code is working when I test it online :

<nav class="navbar bg-light navbar-light navbar-expand">
<ul class="navbar-nav">
  <li class="nav-item dropdown" >
    <a class="nav-link dropdown-toggle" data-toggle="dropdown">Page1</a>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="#">Page1.1</a>
    </div>
  </li>
  <li><a class="nav-link" href="#">Page2</a></li>
</ul>
</nav>

But the dropdown does not work with Angular 6. I've used the following method in order to use Bootstrap with Angular :

ng add @ng-bootstrap/schematics

And everything works fine except for that dropdown item !

Answer 1

I have came across the same problem earlier and I found as below:

1. html should be binded with the class container in bootstrap as mentioned in Bootstrap Layout
2. Dropdowns are built on a third party library Popper.js as mentioned in Bootstrap Dropdown

As far as I know from your problem that you haven't refer to the required javascript i.e. util.js, bootstrap.js, popper.js or minified version.

Here, I have done nothing much, just refer the required javascript files in the index file

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>

And I created a nav component and design as required like this:

<div class="container">
    <!-- Content here -->
    <ul class="nav nav-pills">
        <li class="nav-item">
            <a class="nav-link active" href="#">Active</a>
        </li>
        <li class="nav-item dropdown">
            <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
            <div class="dropdown-menu">
                <a class="dropdown-item" href="#">Action</a>
                <a class="dropdown-item" href="#">Another action</a>
                <a class="dropdown-item" href="#">Something else here</a>
                <div class="dropdown-divider"></div>
                <a class="dropdown-item" href="#">Separated link</a>
            </div>
        </li>
        <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
        </li>
        <li class="nav-item">
            <a class="nav-link disabled" href="#">Disabled</a>
        </li>
    </ul>
</div

The working demo can be found here. Hope this helps you.