message: Selection's magnifier on iOS Safari
diff: @@ -38,6 +38,15 @@ export function addCanvasTo(element: HTMLElement, size: Size): HTMLCanvasElement
  element.appendChild(canvas);
  resizeCanvas(canvas, size);
  + disableSelection(canvas);
  return canvas;
  }
  +
  +function disableSelection(canvas: HTMLCanvasElement): void {
  + canvas.style.userSelect = 'none';
  + canvas.style.webkitUserSelect = 'none';
  + canvas.style.msUserSelect = 'none';
  + // tslint:disable-next-line:no-any
  + (canvas as any).style.MozUserSelect = 'none';
  +}
  