通过Chrome扩展程序访问来自不同域的iframe内容

Question

I'm trying to develop a chrome extension that reads a value from an input element inside of an iframe, which src indicates to a completely different domain.

I already tried including

"all_frames": true,

into the manifest.json, but it seems to get called through a script.

I can see it inside of the "inspect elements" tool, so I assumed that would work, but now I am kind of stuck.

Answer 1

If you have a script that is injected with all_frames: true AND matches both domains, then you have 2 separate instances of content scripts.

They can either talk using postMessage , or through the background page using Messaging (unfortunately, Messaging API can't work directly between them).

This question may be useful as well.