Bootstrap Icons
The bootstrap 4 version does not include an icon library (Glyphicons from Bootstrap 3 are not supported in BS4). There are many free icon libraries, such as Font Awesome and Google Material Design Icons.
How to Include Font Awesome:
You can simply use the freely available Font Awesome icons, add the following to your HTML page (No downloading or installation is required):
LINK:
<link rel=”stylesheet” href=”https://use.fontawesome.com/releases/v5.7.0/css/all.css” integrity=”sha384-lZN37f5QGtY3VHgisS14W3ExzMWZxybE1SJSEsQp9S+oqd12jhcu+A56Ebc1zFSJ” crossorigin=”anonymous”>
Example:
<div class="container"> <p>Others:</p> <i class="fa fa-id-badge" aria-hidden="true"></i> <i class="fa fa-thermometer-quarter" aria-hidden="true"></i> <i class="fa fa-user" aria-hidden="true"></i> <i class="fa fa-window-close" aria-hidden="true"></i> <i class="fa fa-address-card" aria-hidden="true"></i> <i class="fa fa-address-book" aria-hidden="true"></i> </div>
OUTPUT:
Note: leave a space after the closing tag of icon element (i.e. after </i> tag),