.champ-obligatoire:after {
    content: " *";
    color: red;
}

        .bordure-invalide {
            border: 1px solid #dc3545 !important;
        }

        .bordure-valide {
            border: 1px solid #28a745 !important;
        }

/* Réf https://stackoverflow.com/questions/54510043/bootstrap-and-select2-form-validation */
.was-validated .liste-obligatoire:invalid + .select2 .select2-selection {
    border-color: #dc3545 !important;
}

.was-validated .liste-obligatoire:valid + .select2 .select2-selection {
    border-color: #28a745 !important;
}

.was-validated .summernote-obligatoire:invalid + .note-editor.note-frame {
    border-color: #dc3545 !important;
}

.was-validated .summernote-obligatoire:valid + .note-editor.note-frame {
    border-color: #28a745 !important;
}