From e6ad74689093455bc8e519ae1dcfa01bcd7e409b Mon Sep 17 00:00:00 2001
From: "fyue(GongJinJun)" <544648788@qq.com>
Date: Sun, 3 Jun 2018 15:02:28 +0800
Subject: [PATCH] Fixed the bug that when emit(stop) the requestAnimationFrame
 callback still run

---
 src/tracking.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/tracking.js b/src/tracking.js
index 6fcc498..28a7881 100644
--- a/src/tracking.js
+++ b/src/tracking.js
@@ -245,9 +245,10 @@
 // it seems all handled in the tracking.TrackerTask..
 // so in short, remove the tracking.TrackerTask from here
 // if the user want to use it, it can create it himself
-    var requestId;
+    var stopRequestAnimationFrame = false;
     var requestAnimationFrame_ = function() {
-      requestId = window.requestAnimationFrame(function() {
+      window.requestAnimationFrame(function() {
+      	if (stopRequestAnimationFrame) return;
         if (element.readyState === element.HAVE_ENOUGH_DATA) {
           try {
             // Firefox v~30.0 gets confused with the video readyState firing an
@@ -263,7 +264,7 @@
 
     var task = new tracking.TrackerTask(tracker);
     task.on('stop', function() {
-      window.cancelAnimationFrame(requestId);
+      stopRequestAnimationFrame = true;
     });
     task.on('run', function() {
       requestAnimationFrame_();