From b2dd07dab9f86ceed2058ed66f940e5f4334f1c4 Mon Sep 17 00:00:00 2001
From: Katie Gengler <katie@kmg.io>
Date: Tue, 18 Aug 2026 16:20:43 -0400
Subject: [PATCH] Add trailing-history location to enforce trailing slashes on
 URLs

---
 app/locations/trailing-history.js | 16 ++++++++++++++++
 config/environment.js             |  3 ++-
 2 files changed, 18 insertions(+), 1 deletion(-)
 create mode 100644 app/locations/trailing-history.js

diff --git a/app/locations/trailing-history.js b/app/locations/trailing-history.js
new file mode 100644
index 00000000..ef2eadeb
--- /dev/null
+++ b/app/locations/trailing-history.js
@@ -0,0 +1,16 @@
+import HistoryLocation from '@ember/routing/history-location';
+
+/* When using this location type with ember-cli dev server, be sure to 
+   set historySupportMiddleware: true in config/environment.js */
+
+export default class extends HistoryLocation {
+  formatURL() {
+    let url = super.formatURL(...arguments);
+
+    if (url.includes('#')) {
+      return url.replace(/([^/])#(.*)/, '$1/#$2');
+    } else {
+      return url.replace(/\/?$/, '/');
+    }
+  }
+}
diff --git a/config/environment.js b/config/environment.js
index 90d4a233..600dc997 100644
--- a/config/environment.js
+++ b/config/environment.js
@@ -11,7 +11,8 @@ module.exports = function (environment) {
     environment,
     rootURL: '/',
     routerRootURL: '/',
-    locationType: 'history',
+    locationType: 'trailing-history',
+    historySupportMiddleware: true,
     EmberENV: {
       EXTEND_PROTOTYPES: false,
       FEATURES: {