Function a

jquery.min.js:1217–1221

(t)

                i = s.call(arguments),
                o = S.Deferred(),
                a = function (t) {
                    return function (e) {
                        r[t] = this, i[t] = 1 < arguments.length ? s.call(arguments) : e, --n || o.resolveWith(r, i)
                    }
                };
            if (n <= 1 && (I(e, o.done(a(t)).resolve, o.reject, !n), "pending" === o.state() || m(i[t] && i[t].then))) return o.then();
            while (t--) I(i[t], a(t), o.reject);
            return o.promise()