From 9f9ccf3cee66ca2fe5df8c706662cba3bdab7a5f Mon Sep 17 00:00:00 2001
From: Kyle McCarthy <km@kylemccarthy.io>
Date: Fri, 12 Oct 2018 13:49:21 -0500
Subject: [PATCH] Replace negative lookbehind with a more supported regular
 expression (#837)

* provide fix for bug related to parsing GET parameters

* expand to test for a path that has already escaped the query string

* remove negative lookbehind and replaced with alternative regexp due to firefox incompatibility

* follow code style
---
 js/core.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/core.js b/js/core.js
index 4b7b5dc..75c320a 100644
--- a/js/core.js
+++ b/js/core.js
@@ -235,7 +235,7 @@ proto.updateGetPathTemplate = function( optPath ) {
   // convert path option into regex to look for pattern in location
   // escape query (?) in url, allows for parsing GET parameters 
   var regexString = optPath
-    .replace( /(?<!\\)\?/, '\\?' )
+    .replace( /(\\\?|\?)/, '\\?' )
     .replace( '{{#}}', '(\\d\\d?\\d?)' );
   var templateRe = new RegExp( regexString );
   var match = location.href.match( templateRe );