Different Styles
Input
Bottom Border only
.form-control-border
Bottom Border only 2px Border
.form-control-border.border-width-2
Flat
.rounded-0
Custom Select
Bottom Border only
.form-control-border
Value 1
Value 2
Value 3
Bottom Border only
.form-control-border.border-width-2
Value 1
Value 2
Value 3
Flat
.rounded-0
Value 1
Value 2
Value 3