Index: openacs-4/packages/acs-templating/tcl/head-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-templating/tcl/head-procs.tcl,v
diff -u -r1.44 -r1.45
--- openacs-4/packages/acs-templating/tcl/head-procs.tcl	19 Sep 2018 00:38:52 -0000	1.44
+++ openacs-4/packages/acs-templating/tcl/head-procs.tcl	24 Oct 2018 17:01:58 -0000	1.45
@@ -991,7 +991,28 @@
     {*}$cmd
 }
 
+ad_proc template::add_refresh_on_history_handler {} {
+    Register an event handler which will trigger a complete page
+    refresh when we land on this page by accessing the browser's
+    history (back and forward buttons).
 
+    This is useful e.g. for those pages where some push interaction is
+    happening and retrieving the page from the browser history would
+    display it in an inconsistent state.
+} {
+    # courtesy of: vasleo@gmail.com from Stack Overflow
+    template::add_body_script -script {
+        window.addEventListener( "pageshow", function ( event ) {
+            var historyTraversal = event.persisted ||
+            ( typeof window.performance != "undefined" &&
+              window.performance.navigation.type === 2 );
+            if ( historyTraversal ) {
+                window.location.reload();
+            }
+        });
+    }
+}
+
 ad_proc template::add_event_listener {
     {-event click}
     {-CSSclass "acs-listen"}