btn rounded bootstrap 4 code example

Example 1: bootstrap button outline

<button type="button" class="btn btn-outline-primary" href="#">Primary</button>

Example 2: button radius bootstrap 4

<span class="border"></span>
<span class="border-top"></span>
<span class="border-right"></span>
<span class="border-bottom"></span>
<span class="border-left"></span>