bootsteap col code example
Example 1: bootsrap 4 grid
<div class="container">
<div class="row">
<div class="col-sm">
One of three columns
</div>
<div class="col-sm">
One of three columns
</div>
<div class="col-sm">
One of three columns
</div>
</div>
</div>
Example 2: .col-12 bootstrap
.col-12{
flex: 0 0 100%;
max-width: 100%;
}