<div class="d-flex text-white">
<div class="p-2 flex-grow-0 bg-primary">Flex item</div>
<div class="p-2 bg-success">Flex item</div>
<div class="p-2 bg-primary">Third flex item</div>
</div>
<div class="d-flex text-white mt-1">
<div class="p-2 flex-sm-grow-0 bg-danger">Flex item</div>
<div class="p-2 flex-md-grow-0 bg-warning">Flex item</div>
<div class="p-2 flex-lg-grow-0 bg-danger">Flex item</div>
<div class="p-2 flex-xl-grow-0 bg-warning">Flex item</div>
</div>