JSFiddle - React, Tailwind, and code Playground

by jfriend00

JavaScript

window.addEventListener("message", function(e) {
    if (window.location.href.indexOf(e.origin) === 0 && e.source === window) {
        // passed safety check, OK to process here
        document.body.innerHTML = "passed safety check";
    }
});

window.postMessage("hello", "*");