Flutter does not target the web. It is only Android and iOS. GWT can be used (Google’s Inbox app uses it along with J2Objc) but it think it is more tedious. And also both source and target languages are not exactly modern 🙂

Flutter is coded with Dart which targets javascript. GWT may be more tedious, or it may not. I haven't used it in 4 years, but it's still directly applicable for Java code.

Ah yes - the language does. I see what you mean. I was referring to the framework itself targeting only Android and iOS - but you could say that you can have a shared business logic between your flutter app and your web-app.

in Dart we can reuse all the libraries on client side which doesn’t depends on

dart:io

package.