windows popup onload event not working Javascript

Question

let newWindow = open('https://javascript.info', 'example', 'width=300,height=300');
newWindow.onload=()=>{
 alert("Popup Loaded");
}

Onload event was not triggering after the popup window is loaded.

Answer 1

Since it's not the same domain , you will not be able to access the window set properties.

Try this here in console

(function(ow) {
    ow.addEventListener("load", function() { alert("loaded"); }, false);
   
})(window.open('https://stackoverflow.com/', 'example', 'width=300,height=300'));

This will work

But if you put a different domain , it will not work. You'd have to use PostMessage or something else.