class flex-row code example
Example 1: ustify-content: flex-end; bootstrap
<div class="d-flex justify-content-end">...</div>
Example 2: bootstrap display flex
<div class="d-flex">I'm a flexbox container!</div>
<div class="d-flex justify-content-end">...</div>
<div class="d-flex">I'm a flexbox container!</div>