I'm working with Bootstrap 4 beta at the moment and everything works fine, but I have one problem... the display classes like d-none, d-inline, d-inline-block... don't have any effect. Everything else works just fine and I don't understand why they don't work.
for example:
<div class="container">
<div class="row">
<div class="col-xs-12">
<h1 class="bg-success d-inline">Test</h1> <h1 class="bg-success d-inline">Test2</h1>
</div>
</div>
</div>
Those h1 elements are still displayed as block elements. has anyone an idea where the problem could be?