7
Changes BT4 to BT5 :
1 - convert all spacing (margin/padding) with
l (left) to s (start)
r (right) to e (end)
2 - convert text-*
text-left to text-start
text-right to text-end
3 - Dropdown menu
In navbar : data-toggle="dropdown" to data-bs-toggle="dropdown"
4 - Forms
Dropped .input-group-append and .input-group-prepend. You can now just add buttons and .input-group-text as direct children of the input groups.
let's go on...