Communicate between tabs dom without window ref [duplicate]

Answer 1

You have to attach a DOMNodeInserted-listener before the click event is fired, then you can access this window-object.

// assuming that all inserted alements are links or a-tags
// this code must run before the code that adds the a-element
document.addEventListener("DOMNodeInserted", function (ev) {
      var link = ev.target;
      var oldRef = link.href;
      link.onclick = function(event){
        event.preventDefault();
        var childWindow = window.open(oldRef);
        childWindow.onload = function(){
          console.log('at this point you can interact with this newly opened window-object: ',childWindow);
        };
      };
});

//...
// some other code
//...

var p = document.getElementById("myElement"); 
var a = document.createElement('a');
a.setAttribute('href',".../mypage.html");
a.setAttribute('rel',"noreferrer");
a.setAttribute('target',"_blank");
p.appendChild(a);
a.click();

Hope this helps.