1. DomName('Path2D.arcTo')
  2. DocsEditable()
  3. Experimental()
void arcTo(num x1, num y1, num x2, num y2, num radius)

Source 

@DomName('Path2D.arcTo')
@DocsEditable()
@Experimental() // untriaged
void arcTo(num x1, num y1, num x2, num y2, num radius) => _blink.BlinkPath2D.instance.arcTo_Callback_5_(this, x1, y1, x2, y2, radius);