`window.tlab.unitySendMessage` not work when use GeckoView.

[bluesky335]

When I use GeckoView, the JavaScript codewindow.tlab.unitySendMessage doesn't work.
I can't receive the message in the Unity C# component. It only works when using WebView.
However, if I use WebView, the web content is always larger than the WebView and can always be scrolled.

As the screenshot show, The red area is the body, the blue area is the html. they are all 100vh height and 100vw width. You can see the scroll bar is on the right.

[TLabAltoh]

Thanks for the report. Unfortunately, we haven't implemented messaging with C# components in GeckoView yet. The interface implemented with window.tlab currently does not work in GeckoView. Support for window.tlab in GeckoView is still under investigation, and we plan to start implementation as soon as we have a clear path forward.

[TLabAltoh]

@bluesky335
This is a temporary implementation, but I've implemented the functionality to send messages from a GeckoView page script to a C# component (replacing window.tlab.unitySendMessage in WebView). Fully implementing window.tlab from WebView on GeckoView is expected to take time, so please consider this a placeholder that primarily enables message sending to the C# component for now. The current implementation uses window.postMessage, but I plan to support window.tlab on GeckoView in the future. Please use the following JavaScript notation:

let payload = { go: "Test", method: "OnMessage", message: "this is test message." };
window.postMessage({ type: "TLABWEBVIWE_GECKO_NATIVE_MESSAGE", payload: { method: "unitySendMessage", payload: payload } }, "*");

[bluesky335]

@TLabAltoh
Thank you for your reply. Apart from the communication method between GeckoView and C#, there is another bug in content display when using WebView. As described in the second paragraph of this issue, the WebView can always be scrolled, even when the web content does not exceed the screen.