Dart: AJAX form submit
here is an example how to do this
Forms, HTTP servers, and Polymer with Dart
When you change
void main() { querySelector("#signinBtn") ..onClick.listen(handle);}to
void main() { querySelector("form") .onSubmit.listen(handle);}you have access to target
void handle(Event event) { event.preventDefault(); FormElement form = event.target as FormElement; ...}