Issue
is there an approach to have something like a method channel on Flutter web apps to call to the javascript host?
Solution
Yes. JS Interop apparently works fine. Some of the pub packages use it to link flutter web with native JS libs. I think the early firebase packages worked that way as well. Details linked from https://dart.dev/web/js-interop.
Answered By – Randal Schwartz
Answer Checked By – Timothy Miller (FlutterFixes Admin)