it used to be possible to simply access the other DOM via window. As long as they where in the same context (basically domain)<p>Edit:<p>Yep<p><pre><code>  w2 = window.open(&#x27;&#x2F;&#x27;);
  w2.document.click()
</code></pre>
Is fine if complying with the sameOrigin policy<p><a href="https:&#x2F;&#x2F;developer.mozilla.org&#x2F;en-US&#x2F;docs&#x2F;Web&#x2F;API&#x2F;Window&#x2F;open" rel="nofollow">https:&#x2F;&#x2F;developer.mozilla.org&#x2F;en-US&#x2F;docs&#x2F;Web&#x2F;API&#x2F;Window&#x2F;open</a>