diff --git a/todo.yaml b/spike/review/reinvent/ezmded/server/todo.yaml
similarity index 95%
rename from todo.yaml
rename to spike/review/reinvent/ezmded/server/todo.yaml
index bc26274..74579de 100644
--- a/todo.yaml
+++ b/spike/review/reinvent/ezmded/server/todo.yaml
@@ -1,4 +1,5 @@
 todo:
-- https://developer.mozilla.org/en-US/docs/Web/API/History/pushState#change_a_query_parameter
 - preview default via q param
 - css
+done:
+- https://developer.mozilla.org/en-US/docs/Web/API/History/pushState#change_a_query_parameter
diff --git a/spike/review/reinvent/ezmded/ui/index.html b/spike/review/reinvent/ezmded/ui/index.html
index 5c96a20..a1dbb93 100644
--- a/spike/review/reinvent/ezmded/ui/index.html
+++ b/spike/review/reinvent/ezmded/ui/index.html
@@ -189,8 +189,14 @@
             lastNavigateToQuery = new Date()
             const url = new URL(window.location)
             url.searchParams.set(k, v)
-            window.location.hash = "#?"+k+"="+v
-            //window.history.pushState({}, '', url)
+            var hash = "#?"
+            const it = url.searchParams.entries()
+            let result = it.next()
+            while (!result.done) {
+               hash = hash + result.value[0] + "=" + result.value[1] + "&"
+               result = it.next()
+            }
+            window.location.hash = hash
          }
 
          window.onhashchange = () => {