Error: Dropdown functions correctly in standalone HTML page but fails to work within Angular component

Check out the code snippet below for a simple dropdown implementation:

<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>

<div class="btn-group" _ngcontent-c9="" dropdown="">
    <button class="btn btn-light" type="button" _ngcontent-c9="">Action</button>
    <button class="btn btn-light dropdown-toggle dropdown-toggle-split" aria-expanded="false" type="button" data-toggle="dropdown" _ngcontent-c9="">
        <span class="caret" _ngcontent-c9=""></span>
    </button>

    <ul class="dropdown-menu">
        <li><a href="#">abcd</a></li>
        <li><a href="#">efgh</a></li>

    </ul>
</div>

If you're interested in checking out the Angular component, here's the link: When placed in an individual HTML page, it functions properly. However, when included in the Angular component that I created, it doesn't work as expected. Any ideas why?

cssangularbootstrap-4

Answer №1

When incorporating external libraries, it's essential to import them into the main index.html file. It seems like you may have imported bootstrap and jquery in the wrong location. I conducted a test on StackBlitz, and your code performed as expected.

Check out the results on StackBlitz here

Answer №2

Your Import issue may be due to not importing external files globally.

To resolve this, make sure to add the following lines inside your angular.json file within your project:

"styles": [
    //some other styles
    "https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css",
],
"scripts": [
    //some other scripts
    "https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js",
    "https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js",
],

Don't forget to re-run ng-serve

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