1. DomName('CanvasRenderingContext2D.fillRect')
  2. DocsEditable()
void fillRect(num x, num y, num width, num height)

Source 

@DomName('CanvasRenderingContext2D.fillRect')
@DocsEditable()
void fillRect(num x, num y, num width, num height) => _blink.BlinkCanvasRenderingContext2D.instance.fillRect_Callback_4_(this, x, y, width, height);