Свойство rate

num? rate

Реализация

num? get rate native;

void rate=(num? value)

set rate(num? value) native;

© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.19.6/dart-html/SpeechSynthesisUtterance/rate.html