Collect multi-valued query params into vector.

modules/reitit-frontend/src/reitit/frontend.cljs

@@ -3,7 +3,14 @@
             [reitit.coercion :as coercion]
             [reitit.coercion :as rc]
             [reitit.core :as r])
-  (:import goog.Uri))
+  (:import goog.Uri
+           goog.Uri.QueryData))
+
+(defn- query-param [^goog.Uri.QueryData q k]
+  (let [vs (.getValues q k)]
+    (if (< (alength vs) 2)
+      (aget vs 0)
+      (vec vs))))
 
 (defn query-params
   "Given goog.Uri, read query parameters into Clojure map."
@@ -11,7 +18,7 @@
   (let [q (.getQueryData uri)]
     (->> q
          (.getKeys)
-         (map (juxt keyword #(.get q %)))
+         (map (juxt keyword #(query-param q %)))
          (into {}))))
 
 (defn match-by-path

test/cljs/reitit/frontend/core_test.cljs

@@ -39,6 +39,16 @@
                              :path {}}})
              (rf/match-by-path router "/foo")))
 
+      (is (= (r/map->Match
+               {:template "/foo"
+                :data {:name ::foo}
+                :path-params {}
+                :query-params {:mode ["foo", "bar"]}
+                :path "/foo"
+                :parameters {:query {:mode ["foo", "bar"]}
+                             :path {}}})
+             (rf/match-by-path router "/foo?mode=foo&mode=bar")))
+
       (is (= "/foo"
              (r/match->path (rf/match-by-name router ::foo))))