<div class="d-flex text-white">
<div class="p-2 flex-grow-1 flex-xxl-grow-0 bg-primary">Flex item</div>
<div class="p-2 bg-info">Flex item</div>
<div class="p-2 bg-primary">Flex item</div>
</div>
You don't need to remember all CSS classes. Just use the Bootstrap Editor instead.