Javascript communication between browser tabs/windows [duplicate]

Answer 1

Below window(w1) opens another window(w2). Any window can send/receive message to/from another window. So we should ideally verify that the message originated from the window(w2) we opened.

In w1

var w2 = window.open("abc.do");
window.addEventListener("message", function(event){
    console.log(event.data);
});

In w2(abc.do)

window.opener.postMessage("Hi! I'm w2", "*");