new google.ima.AdsLoader

var videoElement;var adsLoaded = false;var adContainer;var adDisplayContainer;var adsLoader;var adsManager;...function initializeIMA() {  console.log("initializing IMA");  adContainer = document.getElementById('ad-container');  adDisplayContainer = new google.ima.AdDisplayContainer(adContainer, videoElement);  adsLoader = new google.ima.AdsLoader(adDisplayContainer);  adsLoader.addEventListener(      google.ima.AdsManagerLoadedEvent.Type.ADS_MANAGER_LOADED,      onAdsManagerLoaded,      false);  adsLoader.addEventListener(      google.ima.AdErrorEvent.Type.AD_ERROR,      onAdError,      false);...function onAdsManagerLoaded(adsManagerLoadedEvent) {  // Instantiate the AdsManager from the adsLoader response and pass it the video element  adsManager = adsManagerLoadedEvent.getAdsManager(      videoElement);}function onAdError(adErrorEvent) {  // Handle the error logging.  console.log(adErrorEvent.getError());  if(adsManager) {    adsManager.destroy();  }}