jquery-ui datepicker if no support for type="date"

datepicker.js

// check for support of a datepicker
// assume that the browser must be able to parse the date if it is of type date
$.support.datepicker = (function () {
    var el = document.createElement('input'), notADateValue = 'not-a-date';
    el.setAttribute('type', 'date');
    el.setAttribute('value', notADateValue);
    return !(el.value === notADateValue);
})();

// if not supported jquery-ui to the rescue
if (! $.support.datepicker) {
    $(document).on("ready update.datepicker", function (e) {
        var $target = $(e.target);
        var $datepicker = $target.find("input[type=date]");

        $datepicker.each(function () {
            var $this = $(this);
            var data = $this.data();
            for (var key in data) {
                data[$.camelCase(key)] = data[key];
            }
            $this.datepicker(data);
        });
    });
}