From ff84778d9bb224d4153be195c09dd82352d3a24b Mon Sep 17 00:00:00 2001
From: Alexis Georges <alexis.georges@gmail.com>
Date: Mon, 22 Aug 2016 11:33:55 -0700
Subject: [PATCH] use truthy check and only register history listeners if there
 are goals

---
 src/index.js | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/index.js b/src/index.js
index 37580dbf..72b8f4d6 100644
--- a/src/index.js
+++ b/src/index.js
@@ -260,7 +260,7 @@ function initialize(env, user, options) {
   });
   
   function refreshGoalTracker() {
-    if (goalTracker !== null) {
+    if (goalTracker) {
       goalTracker.dispose();
     }
     if (goals && goals.length) {
@@ -268,13 +268,14 @@ function initialize(env, user, options) {
     } 
   }
 
-  if (!!(window.history && history.pushState)) {
-    window.addEventListener('popstate', refreshGoalTracker);  
-  } else {
-    window.addEventListener('hashchange', refreshGoalTracker);
+  if (goals && goals.length > 0) {
+    if (!!(window.history && history.pushState)) {
+      window.addEventListener('popstate', refreshGoalTracker);  
+    } else {
+      window.addEventListener('hashchange', refreshGoalTracker);
+    }
   }
 
-
   window.addEventListener('message', handleMessage);
 
   return client;