button border bootstrap 4 code example

Example 1: bootstrap Outline buttons

In need of a button, but not the hefty background colors they bring? 
Replace the default modifier classes with the .btn-outline-* ones to 
remove all background images and colors on any button.

Primary
Secondary
Success
Danger
Warning
Info
Light
Dark

Example 2: border radius bootstrap

Border-radius
Add classes to an element to easily round its corners.