String cookie

Source 

@DomName('Document.cookie')
@DocsEditable()
String get cookie => _blink.BlinkDocument.instance.cookie_Getter_(this);
void cookie=(String value)

Source 

@DomName('Document.cookie')
@DocsEditable()
set cookie(String value) =>
    _blink.BlinkDocument.instance.cookie_Setter_(this, value);