My new shitty idea for having an iframe interact with the TurboWarp project that should work in theory;

Let’s say you click a button, upon clicking, the button will then change the innerHTML of an invisible element on the top of the webpage.

The TurboWarp project will then detect a change in the iframe URL and check what the content of the inner element is, and do an action accordingly.

Edit: Nope.. Pretty sure it just returns the src attribute, which is static.