Foolproof way to detect if this page is INSIDE a cross-domain iframe

Question

An answer to \"Foolproof way to detect if iframe is cross domain\" describes a method to test if an iframe on a page points to a same-domain or cross-domain page, working ar

Answer 1

With your current restrictions, there's no way to achieve this using the DOM API. Any evaluation with a window that belongs to another domain will spew out an error.

However, a "hack" would be to send an XHR from your child window to load a known page in your domain. If this XHR completes successfully, then you know that both windows are the same domain.

However, this will log an error message to the console.