linusthe3rd · June 30, 2022 15:21 · May 6, 2014 · Mar 2, 2014
diff --git a/exponentialBackoff.js b/exponentialBackoff.js
@@ -1,6 +1,7 @@
+var attempts = 1;
+
 function createWebSocket () {
   var connection = new WebSocket();
-  var attempts = 1;
 
   connection.onopen = function () {
     // reset the tries back to 1 since we have a new connection opened.

diff --git a/exponentialBackoff.js b/exponentialBackoff.js
@@ -0,0 +1,34 @@
+function createWebSocket () {
+  var connection = new WebSocket();
+  var attempts = 1;
+
+  connection.onopen = function () {
+    // reset the tries back to 1 since we have a new connection opened.
+    attempts = 1; 
+
+    // ...Your app's logic...
+  }
+
+  connection.onclose = function () {
+    var time = generateInterval(attempts);
+
+    setTimeout(function () {
+        // We've tried to reconnect so increment the attempts by 1
+        attempts++;
+
+        // Connection has closed so try to reconnect every 10 seconds.
+        createWebSocket(); 
+    }, time);
+  }
+}
+
+function generateInteval (k) {
+  var maxInterval = (Math.pow(2, k) - 1) * 1000;
+
+  if (maxInterval > 30*1000) {
+    maxInterval = 30*1000; // If the generated interval is more than 30 seconds, truncate it down to 30 seconds.
+  }
+
+  // generate the interval to a random number between 0 and the maxInterval determined from above
+  return Math.random() * maxInterval; 
+}