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.g-*, .gx-* and .gy-* (inclduing .g-0).mn-*…-left and …-right are renamed to …-start and …-end (to cope with RTL languages)<thead> and <tfoot> can have .table-light or .table-dark classes.bg- on checkboxes and radio buttons to change color, e.g. * ''<button>''s within a ''<form>'' default to ''type="submit"'', so strive to be specific and always include a ''type''
<div class="form-check">
<input class="form-check-input bg-success" type="checkbox" value="" id="flexCheckDefault">
<label class="form-check-label" for="flexCheckDefault">
Default checkbox
</label>
</div>
role="button" to change cursor into pointer for an element (not needed for <button>).img-fluid.img-thumbnail.form-control-plaintext for <input readonly> form fields<input type="color" class="form-control form-control-color" id="exampleColorInput" value="#563d7c" title="Choose your color"><button>s within a <form> default to type="submit", so strive to be specific and always include a type