Issue #3482067: Drupal.Views.parseQueryString returns incorrect results

Issue #3482067: Drupal.Views.parseQueryString returns incorrect results for queries without parameters

Closes #3482067

core/modules/views/js/base.js

@@ -22,6 +22,8 @@
     const args = {};
     if (query.includes('?')) {
       query = query.substring(query.indexOf('?') + 1);
+    } else {
+      return {};
     }
     let pair;
     const pairs = query.split('&');