bootstrap flex basic code example

Example 1: flex wrap bootstrap

<div class="d-flex flex-wrap">...</div>

Example 2: Bootstrap 4 Flex

<div class="d-flex p-3 bg-secondary text-white">
  <div class="p-2 bg-info">Flex item 1</div>
  <div class="p-2 bg-warning">Flex item 2</div>
  <div class="p-2 bg-primary">Flex item 3</div>
</div>