The new method for dynamic elements is MutationsObserver .. The following example uses underscore.js to use ( _.each ) function.
MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;    
var observerjQueryPlugins = new MutationObserver(function (repeaterWrapper) {
    _.each(repeaterWrapper, function (repeaterItem, index) {
        var jq_nodes = $(repeaterItem.addedNodes);
        jq_nodes.each(function () {
            // Date Picker
            $(this).parents('.current-repeateritem-container').find('.element-datepicker').datepicker({
                dateFormat: "dd MM, yy",
                showAnim: "slideDown",
                changeMonth: true,
                numberOfMonths: 1
            });
        });
    });
});
observerjQueryPlugins.observe(document, {
    childList: true,
    subtree: true,
    attributes: false,
    characterData: false
});