Asynchronously load and initialize Facebook sanely using YUI.

Facebook.js

YUI.add("facebook", function (Y) {
  "use strict";
  var isFunction = Y.Lang.isFunction,
    queue = [],
    win = Y.config.win,
    FB;

  function queueInArray(callback) {
    queue.push(callback);
  }
  function fbIsLoaded(callback) {
    if (isFunction(callback)) {
      callback(FB);
    }
  }
  function asyncInit() {
    FB = win.FB;
    FB.init({
      appId:      FACEBOOK_APP_ID,
      channelUrl: FACEBOOK_CHANNEL_PATH,
      status:     true,
      cookie:     true,
      xfbml:      true
    });
    Y.loadFacebook = fbIsLoaded;
    Y.Array.each(queue, fbIsLoaded);
  }
  function firstLoad(callback) {
    Y.loadFacebook = queueInArray;
    queueInArray(callback);
    if (!Y.one("#fb-root")) {
      Y.one("body").insert("<div id=\"fb-root\" style=\"position:absolute;top:0;left:0;\"></div>", 0);
    }
    win.fbAsyncInit = asyncInit;
    Y.Get.script("//connect.facebook.net/en_US/all.js");
  }
  
  Y.loadFacebook = firstLoad; 

}, "3.4.1", { requires: ["node-base"] });