Adding Bootstrap in Angular app is as easy as adding it to any simple HTML application.
Simply add this code to your src/index.html file head in your Angular application.
//add this code to head tag in src/index.html file
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
Test it by running your angular app and adding some Bootstrap classes to any html elements in your src/app.component.html file.
Angular 9 app bootstrap Bootstrap 4 web
