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// extend jQuery
$.each(['show', 'hide'], function(i, ev) {
    var el = $.fn[ev];
    $.fn[ev] = function() {
        this.trigger(ev);
        return el.apply(this, arguments);
    };
});

// then simply attach listener
$(".my-element").on("show", function() {
    console.log('my-element shown');
});