From 63361538d6be9ebffdb255b2140cb60fec21b2f9 Mon Sep 17 00:00:00 2001
From: David-dp- <David-dp-@users.noreply.github.com>
Date: Wed, 3 Jun 2020 13:26:11 -0700
Subject: [PATCH] Fix issue 6

Issue 6 (an error occurs in the constructor of both the source and minified versions) always occurred for me in current Chrome/Win10 before this change, and doesn't after this change. This change is the one suggested by others in issue 6.
---
 reconnecting-websocket.js | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/reconnecting-websocket.js b/reconnecting-websocket.js
index 0cd4332..2ec130a 100644
--- a/reconnecting-websocket.js
+++ b/reconnecting-websocket.js
@@ -228,7 +228,9 @@
                     console.debug('ReconnectingWebSocket', 'connection-timeout', self.url);
                 }
                 timedOut = true;
-                localWs.close();
+                if (!!localWs && localWs.readyState !== WebSocket.CLOSED) {
+                    localWs.close();
+                }
                 timedOut = false;
             }, self.timeoutInterval);
 
@@ -330,7 +332,7 @@
          * For example, if the app suspects bad data / missed heart beats, it can try to refresh.
          */
         this.refresh = function() {
-            if (ws) {
+            if (!!ws && ws.readyState !== WebSocket.CLOSED) {
                 ws.close();
             }
         };