jsModuleMainLibrary top-level property
The path to a Dart library whose main()
method will be called when the
compiled JavaScript module is loaded.
All the package's executables are compiled into a single JS file. The
main()
method of the given library will be invoked when that JS file is
first imported. It should take no arguments.
This is most commonly used to export functions so that the npm package is
usable as a JS library. For example, to export a sayHello()
function, this
library might look like:
import 'package:js/js.dart';
@JS()
class _Exports {
external set sayHello(function);
}
@JS()
external get _Exports exports;
void main() {
exports.sayHello = allowInterop(() => print("Hello, world!"));
}
This path is relative to the root of the package. It defaults to null
,
which means no user-defined code will run when the module is loaded.
Implementation
final jsModuleMainLibrary = InternalConfigVariable.value<String?>(null);