Added onRespondComplete callback.

README.md

@@ -105,7 +105,15 @@ Sure, a couple:
 - respond.update() : rerun the parser (helpful if you added a stylesheet to the page and it needs to be translated)
 - respond.mediaQueriesSupported: set to true if the browser natively supports media queries.
 - respond.getEmValue() : returns the pixel value of one em
-
+- respond.onRespondComplete : will be called after respond finishes it's job.
+    Example:
+<pre>
+window.respond.onRespondComplete = function(){
+                    //make body visible after css is parsed, in order to prevent flickering
+                     document.body.style.visibility = 'visible';
+                 };
+ window.respond.update();
+</pre>
 
 Alternatives to this script
 ======

dest/respond.matchmedia.addListener.src.js

@@ -1,5 +1,5 @@
 /*! Respond.js v1.4.2: min/max-width media query polyfill
- * Copyright 2014 Scott Jehl
+ * Copyright 2015 Scott Jehl
  * Licensed under MIT
  * http://j.mp/respondjs */
 
@@ -242,14 +242,17 @@
   }, makeRequests = function() {
     if (requestQueue.length) {
       var thisRequest = requestQueue.shift();
-      ajax(thisRequest.href, function(styles) {
+      return ajax(thisRequest.href, function(styles) {
         translate(styles, thisRequest.href, thisRequest.media);
         parsedSheets[thisRequest.href] = true;
         w.setTimeout(function() {
           makeRequests();
         }, 0);
       });
     }
+    if (typeof respond.onRespondComplete === "function") {
+      respond.onRespondComplete.call(w);
+    }
   }, ripCSS = function() {
     for (var i = 0; i < links.length; i++) {
       var sheet = links[i], href = sheet.href, media = sheet.media, isCSS = sheet.rel && sheet.rel.toLowerCase() === "stylesheet";