Firemonkey: Target an <iframe/> in a shadow DOM?

[simonwiles]

I want to execute a script in the context of an iframe (cross-origin) that's loaded in the shadow DOM of a web component. Obviously I can't do this from javascript executed in the context of the parent document because of the cross-origin policy, but also Firemonkey isn't matching the document in the iframe when its inside a shadow DOM (it works with a regular iframe).

Is this something that could be "fixed" in Firemonkey? Are there any workarounds available to me?

Thanks!

[erosman]

Is this something that could be "fixed" in Firemonkey?

There are discussions in the WebExtensions Community Group (WECG) currently, regarding the shadow DOM access.

• Shadow DOM problems for extensions
• Expose openOrClosedShadowRoot for userscripts
• Proposal: getLeafTarget() method

Are there any workarounds available to me?

I have not tested it so I am unaware of the possibilities.

[simonwiles]

I was hoping/expecting that my script would be injected when the iframe loaded its document (my @match matches the correct URI), as would be the case if the iframe is in the light DOM. I see the problem is more complicated than I realized. Thanks for your response 👍️.