Iframe parent postMessage

by alpac

HTML

<input type="file" id="fileinput">
<iframe id="remotepage"         
        src="https://fiddle.jshell.net/alpac/h8jLy1qz/9/show"
        width="100%"
        height="250px"
        noborder="true">

JavaScript

alert(1)
console.log(23)

/* const input = document.querySelector('#fileinput');
const iframe = document.querySelector('#remotepage');

input.addEventListener('change', (e) => {
  console.log(e);
});

console.log(1, input, iframe);
 */