When the ad script finishes loading, window.nitroAds.loaded will be set to true. If the script is loaded asynchronous, this variable may not be available immediately.
A custom event, nitroAds.loaded, is also fired on the document when loading is completed.
if (window.nitroAds && window.nitroAds.loaded) {
// nitroAds was already loaded
} else {
// wait for loaded event
document.addEventListener("nitroAds.loaded", event => {
// nitroAds just loaded
});
}
