JSFiddle - React, Tailwind, and code Playground

HTML

<iframe name="iframeId" id="iframeId" width="100%" height="100%" src="about:blank"></iframe>

JavaScript

document.getElementById('iframeId').contentWindow.document.body.innerHTML =
    '<a href="#" title="link1">link1</a>\
     <a href="#" title="link2">link2</a>\
     <a href="#" title="link3">link3</a>\
     <a href="#" title="link4">link4</a>';

var iframe = document.getElementById('iframeId');
var innerDoc = (iframe.contentDocument) ? iframe.contentDocument : iframe.contentWindow.document;

var links = innerDoc.getElementsByTagName("a");
for (var i = 0; i < links.length; i++) {
  links[i].removeAttribute("title");
}