flex-direction column in bootstrap 4 code example
Example 1: bootstrap flex direction column
d-flex flex-column
Example 2: ustify-content: flex-end; bootstrap
<div class="d-flex justify-content-end">...</div>
Example 3: flex direction column bootstrap 4
<div class="d-flex justify-content-start">...</div>
<div class="d-flex justify-content-end">...</div>
<div class="d-flex justify-content-center">...</div>
<div class="d-flex justify-content-between">...</div>
<div class="d-flex justify-content-around">...</div>