Make embedded (X)HTML or SVG documents in <object> accessible

https://www.w3.org/Bugs/Public/show_bug.cgi?id=29792

comfreek:

It is currently not possible to access objects embedded in tags:

<object data="file.svg" type="image/svg+xml"></object>
<object data="file.html" type="text/html"></object>
<object data="file.xhtml" type="application/xml+xhtml"></object>

First, none of the locator strategies are able to "deep-select" elements originating from objectElement.contentDocument.

Second, bypassing the selection problem by executing a custom JS script in order to return the nested elements results in "stale element reference" error upon usage of the acquired reference. This could be solved if a switch to an object's contentDocument context was possible.

My use case in my application for embedding an SVG via is that I can quickly replace it by setting the data URI while maintaining access to its contents via contentDocument.

Read the linked W3C bug first, then compare its request with the WebDriver specification's handling of objectElement.contentDocument. No repository file or test is named; completion would require an agreed mechanism for selecting elements in embedded SVG, HTML, and XHTML documents while avoiding stale references.