typekit-events.js

(function(){
  var fontsLoaded = false;
  var listeners   = [];

  function fontsDidLoad(){
    for (var i = 0; i < listeners.length; i += 1) { setTimeout(listeners[i], 0); }
    fontsLoaded = true;
  }
  
  window.onFontsLoaded = function(callback){
    if (fontsLoaded) return setTimeout(callback, 0);
    listeners.push(callback);
  };

  Typekit.load({ active: fontsDidLoad });
})();