From 0c2c12fdd9263929b90db6dc8d9ab8977f4074bf Mon Sep 17 00:00:00 2001
From: Shannon <sdeminick@gmail.com>
Date: Tue, 27 Feb 2018 01:38:53 +1100
Subject: [PATCH] ensures that the template cache is cleared on startup if it
 hasn't been tracked in local storage

---
 src/Umbraco.Web.UI.Client/src/app.js | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/Umbraco.Web.UI.Client/src/app.js b/src/Umbraco.Web.UI.Client/src/app.js
index 0130124e4f..4a44959b15 100644
--- a/src/Umbraco.Web.UI.Client/src/app.js
+++ b/src/Umbraco.Web.UI.Client/src/app.js
@@ -22,12 +22,21 @@ var packages = angular.module("umbraco.packages", []);
 //module is initilized.
 angular.module("umbraco.views", ["umbraco.viewcache"]);
 angular.module("umbraco.viewcache", [])
-    .run(function($rootScope, $templateCache) {
+    .run(function ($rootScope, $templateCache, localStorageService) {
         /** For debug mode, always clear template cache to cut down on
             dev frustration and chrome cache on templates */
         if (Umbraco.Sys.ServerVariables.isDebuggingEnabled) {
             $templateCache.removeAll();
         }
+        else {
+            var storedVersion = localStorageService.get("umbVersion");
+            if (!storedVersion || storedVersion !== Umbraco.Sys.ServerVariables.application.cacheBuster) {
+                //if the stored version doesn't match our cache bust version, clear the template cache
+                $templateCache.removeAll();
+                //store the current version
+                localStorageService.set("umbVersion", Umbraco.Sys.ServerVariables.application.cacheBuster);
+            }
+        }
     })
     .config([
         //This ensures that all of our angular views are cache busted, if the path starts with views/ and ends with .html, then