String returnValue

Source 

@DomName('BeforeUnloadEvent.returnValue')
@DocsEditable()
String get returnValue =>
    _blink.BlinkBeforeUnloadEvent.instance.returnValue_Getter_(this);
void returnValue=(String value)

Source 

@DomName('BeforeUnloadEvent.returnValue')
@DocsEditable()
set returnValue(String value) =>
    _blink.BlinkBeforeUnloadEvent.instance.returnValue_Setter_(this, value);