Two-Way Communication Between Flutter web and JavaScript with Different Origins not working

[dgurudot]

Description:
I'm using flutter_inappwebview version 6.0.0 for my Flutter application, and I need to establish two-way communication between the Flutter web app and JavaScript, where both sides have different origins.

Steps to Reproduce:
1. Set up an InAppWebView in a Flutter app.
2. Implement JavaScript code in a web application loaded into the InAppWebView.
3. Establish bidirectional communication between Flutter and JavaScript, ensuring both have different origins.
4.
Expected Behaviour:
Messages should be able to be sent and received between Flutter and JavaScript, allowing for seamless two-way communication despite different origins.

Additional Context:
I've tried utilizing the postMessage, addJavascriptHandlers, and webMessageChannels to handle communication from JavaScript to Flutter. However, I'm unsure how to handle communication from Flutter web to JavaScript and ensure bidirectional communication is established correctly.

[github-actions]

👋 @dgurudot

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In the meantime, you can already search for some possible solutions online! Because this plugin uses native WebView, you can search online for the same issue adding android WebView [MY ERROR HERE] or ios WKWebView [MY ERROR HERE] keywords.

Following these steps can save you, me, and other people a lot of time, thanks!

[NOTKATEAMmainAndroidDeveloper]

Get same issue

[haenah]

Same here ✋