Bootstrap 4 invalid feedback with input group not displaying

Question

I have been looking into Bootstrap 4 - beta, however when using .is-invalid with .input-group it doesn\'t seem to show up.

Answer 1

Boostrap 4 is very buggy. My suggestion is to replace:

 

 Text here
 

With:

Text here

And the second one looks virtually the same and will not fail.

For a better look, try:

Text here