Writer 2

Write to an iframe using the contentDocument property

by Morteza Mirmojarabian

HTML

<iframe id="myIframe"></iframe>
<button id="myButton">Write</button>

JavaScript

document.getElementById('myButton').addEventListener('click', function() {
  var iframeDocument = document.getElementById('myIframe').contentDocument;
  iframeDocument.open();
  iframeDocument.write('Hello, world!');
  iframeDocument.close();
});