Mutation Observer simple style checker

mutation.js

  var MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;
  var container = document.querySelector('paper-dialog.ytd-popup-container');
 
  var observer = new MutationObserver(function(mutations) {
    mutations.forEach(function(mutation) {
      console.log(mutation);
          if(mutation.attributeName === 'style'){
          if(!(container.style.display === 'none')){
            console.log('triggering click'); 
            var y = document.querySelector('.yt-confirm-dialog-renderer yt-formatted-string[id="text"]'); 
            y.click();
          }
        }
    });
  });
 
  observer.observe(container, {
      attributes: true, 
      attributeFilter: ["style"]
   });