Bootstrap confirmation box works good. Here is the code.
<a href="#" data-id = "{{ salaire.getDate_debut()|date("d/m/Y") }}" data-toggle="confirmation" data-title="Confirmer la suppression ?" data-singleton="true" data-popout="true" target="_self">confirmation</a>
Unfortunatly when page is reloaded (F5) or when you leave the page and come back, the box confirmation box does not appear anymore.
Note : recharging the element only causes the same thing.
Somebody knows why ?
Thank you