bootstrap display classes lg sm md code example
Example 1: bootstrap hide row
<div class="d-none"></div> for bootstrap 4
Example 2: .col-12 bootstrap
.col-12{
flex: 0 0 100%;
max-width: 100%;
}
<div class="d-none"></div> for bootstrap 4
.col-12{
flex: 0 0 100%;
max-width: 100%;
}