fa icon button bootstrap code example

Example 1: bootstrap 4 button with icon

<!-- Add icon library -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">


<button class="btn"><i class="fa fa-home"></i></button>

Example 2: font awesome in button

<button>
  <i class="fas fa-thumbs-up"></i> Like
</button>