Flutter JS

Key Differences Between TypeScript and Dart TypeScript is a language designed to be a Typed superset of JavaScript; thus, JavaScript is valid TypeScript code, whereas Dart is a full scripting language on its own, not a superset of JavaScript .

If you pass a Dart function to a JavaScript API as an argument, wrap the Dart function using allowInterop() or allowInteropCaptureThis() . To make a Dart function callable from JavaScript by name, use a setter annotated with @JS() . @JS() library callable_function; import ‘package:js/js.

Using JavaScript in Dart & Flutter Dart. js is a built-in library that can interop with JavaScript.