JSFiddle - React, Tailwind, and code Playground

by tobint

HTML

Listener:

<div id="messages">
</div>

JavaScript

var msgs = document.getElementById("messages");

window.addEventListener("message", function(event) {
    logWindow("message received: " + event.data);
    event.source.postMessage("post back: ", event.origin);
    
}, false);

function logWindow(msg) {
    msgs.innerHTML += msg + "<br/>";    
}