From a9113369ef750f2c9d294f2031e5f21f39360e1d Mon Sep 17 00:00:00 2001
From: Jeremy Kauffman <kauffj@gmail.com>
Date: Thu, 31 Aug 2017 08:59:29 -0400
Subject: [PATCH] fix off by 1 error in navigation history

---
 ui/js/reducers/navigation.js | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/ui/js/reducers/navigation.js b/ui/js/reducers/navigation.js
index eca9bd008..821db9183 100644
--- a/ui/js/reducers/navigation.js
+++ b/ui/js/reducers/navigation.js
@@ -41,17 +41,12 @@ reducers[types.HISTORY_NAVIGATE] = (state, action) => {
 
   let newState = {};
 
-  const path = action.data.url,
-    previousIndex = index - 1;
+  const path = action.data.url;
 
   // Check for duplicated
   if (action.data.index >= 0) {
     newState.index = action.data.index;
-  } else if (
-    previousIndex === -1 ||
-    !stack[previousIndex] ||
-    stack[previousIndex].path !== path
-  ) {
+  } else if (!stack[index] || stack[index].path !== path) {
     newState.stack = [...stack.slice(0, index + 1), { path, scrollY: 0 }];
     newState.index = newState.stack.length - 1;
   }