int tabIndex

Source 

@DomName('HTMLElement.tabIndex')
@DocsEditable()
int get tabIndex => _blink.BlinkHTMLElement.instance.tabIndex_Getter_(this);
void tabIndex=(int value)

Source 

@DomName('HTMLElement.tabIndex')
@DocsEditable()
set tabIndex(int value) =>
    _blink.BlinkHTMLElement.instance.tabIndex_Setter_(this, value);