js/MultiEmailInput.js
$('.init-multi-email-input').on('extension::multi-email-input::init', function(event) {
element = $(event.currentTarget);
if (!$(this).hasClass('multi-email-input-applied')) {
$(this).multiEmail();
$(this).addClass('multi-email-input-applied');
$(this).addClass('bootstrap-multiemail');
element.trigger('extension::multi-email-input::applied');
}
});