allianceauth/static/admin/js/prepopulate.min.js

(function (a) {
    a.fn.prepopulate = function (d, g) {
        return this.each(function () {
            var b = a(this);
            b.data("_changed", false);
            b.change(function () {
                b.data("_changed", true)
            });
            var c = function () {
                if (b.data("_changed") != true) {
                    var e = [];
                    a.each(d, function (h, f) {
                        a(f).val().length > 0 && e.push(a(f).val())
                    });
                    b.val(URLify(e.join(" "), g))
                }
            };
            a(d.join(",")).keyup(c).change(c).focus(c)
        })
    }
})(django.jQuery);