arturparkhisenko

const url = origin + '/amp_preconnect_polyfill?' + Math.random();
const xhr = new XMLHttpRequest();
xhr.open('HEAD', url, true);
xhr.send();

arturparkhisenko

const prefetch = document.createElement('link');
prefetch.setAttribute('rel', 'prefetch');
prefetch.setAttribute('href', url);
document.head.appendChild(prefetch);

arturparkhisenko

var inFullScreen = document.fullscreenEnabled || document.fullscreenElement ||
  window.fullScreen || document.webkitIsFullScreen || document.msFullscreenEnabled;
if (inFullScreen) {
  //do something..
  if (document.exitFullscreen) {
    document.exitFullscreen();
  } else if (document.mozCancelFullScreen) {
    document.mozCancelFullScreen();
  } else if (document.webkitExitFullscreen) {
    document.webkitExitFullscreen();

arturparkhisenko

// array utils
// =================================================================================================

const combine = (...arrays) => [].concat(...arrays);

const compact = arr => arr.filter(Boolean);

const contains = (() => Array.prototype.includes
  ? (arr, value) => arr.includes(value)
  : (arr, value) => arr.some(el => el === value)

arturparkhisenko

// Example 1
mediator.name = 'Doug';
mediator.subscribe('nameChange', function(arg){
     console.log(this.name);
     this.name = arg;
     console.log(this.name);
});

mediator.publish('nameChange', 'Jorn');

arturparkhisenko

var MyModule = ( function( window, undefined ) {

  // revealing module pattern ftw
  function MyModule() {
    
    function someMethod() {
      alert( 'some method' );
    }
    
    function someOtherMethod() {

arturparkhisenko

// a simple facade that masks the various browser-specific methods
function addEvent( element, event, callback ) {
  
  if( window.addEventListener ) {
    element.addEventListener( event, callback, false );
  } else if( document.attachEvent ) {
    element.attachEvent( 'on' + event, callback );
  } else {
    element[ 'on' + event ] = callback;
  }

arturparkhisenko

// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel
// MIT license
(function() {
  var lastTime = 0;
  var vendors = ['ms', 'moz', 'webkit', 'o'];
  for (var x = 0; x < vendors.length && !window.requestAnimationFrame; x++) {
    window.requestAnimationFrame = window[vendors[x] + 'RequestAnimationFrame'];
    window.cancelAnimationFrame = window[vendors[x] + 'CancelAnimationFrame'] || window[vendors[x] + 'CancelRequestAnimationFrame'];