I have an HTML Host1Page with an IFRAME, the IFRAME's attribute sandbox doesn't include allow-top-navigation so the hosting page is not affected by any navigation which could be requested inside the IFRAME. Originally the IFRAME renders static HTML I supply but then, once a user interacts with it in a certain way, the HTML's javascript redirects the current window, which is the IFRAME's content in my case, to another host - Host2Page. As a result the IFRAME renders a content of the Host2Page. Want to emphasis I'm not setting the IFRAME's src property but instead setting the window.location.href, I cannot change the way the redirect is done because I don't own the code making that redirect. Once a user finishes interacting with that another site, Host2Page, the user is redirected back to the Uri corresponding to the page hosting my IFRAME - Host1Page, while redirecting the Host2Page is supplying some data via query parameters. How do I get access to that query parameter from within the IFRAME?
I tried employing myIFrame.contentWindow.location.search - but it always is empty and the myIFrame.contentWindow.location.href is always, before and after the redirect to that another site, pointing to the Uri of the page Host1Page hosting the IFRAME.