num valueAsNumber

Source 

@DomName('HTMLInputElement.valueAsNumber')
@DocsEditable()
num get valueAsNumber =>
    _blink.BlinkHTMLInputElement.instance.valueAsNumber_Getter_(this);
void valueAsNumber=(num value)

Source 

@DomName('HTMLInputElement.valueAsNumber')
@DocsEditable()
set valueAsNumber(num value) =>
    _blink.BlinkHTMLInputElement.instance.valueAsNumber_Setter_(this, value);