.col-xs
, .col-sm
, .col-md
and .col-lg
are not part of the Bootstrap framework's predefined classes. The .navbar
component in Bootstrap serves as their header element and is already designed to be responsive.
If you want to create custom classes that function according to your design requirements, you can utilize media queries. However, it's important to note that .col-xs should not be placed within a media query (assuming the default breakpoints from Bootstrap 3.x are being used):
header.col-xs {styles}
@media (min-width:768px) {
header.col-sm {styles}
}
@media (min-width:992px) {
header.col-md {styles}
}
@media (min-width:1200px) {
header.col-lg {styles}
}
To enhance clarity and accuracy, especially since a header is distinct from a column, consider renaming these classes to .header-xs
, .header-sm
, .header-md
, .header-lg
. Alternatively, you could forego using size-specific classes altogether and craft your header design solely through media queries:
.header { base header styles applicable across all viewport widths }
@media (min-width:768px) {
.header {additional styles specific to this viewport width }
}
and continue implementing similar approaches...