add maxReconnectAttempts to limit number of retries

Author: Charlie Somerville

reconnecting-websocket.js

@@ -122,6 +122,9 @@
 
             /** The maximum time in milliseconds to wait for a connection to succeed before closing and retrying. */
             timeoutInterval: 2000
+
+            /** The maximum number of reconnection attempts to make. Unlimited if null. */
+            maxReconnectAttempts: null,
         }
         if (!options) { options = {}; }
 
@@ -202,6 +205,10 @@
                 eventTarget.dispatchEvent(generateEvent('connecting'));
             }
 
+            if (this.maxReconnectAttempts && this.reconnectAttempts > this.maxReconnectAttempts) {
+                return;
+            }
+
             if (self.debug || ReconnectingWebSocket.debugAll) {
                 console.debug('ReconnectingWebSocket', 'attempt-connect', self.url);
             }