The enter key should not cause an order item to be deleted.

The following code forces an enter key to cause a blur, auto-updating quantities. However, it does not prevent the default operation, which is submitting the form. This causes the focused order item to be deleted.

        onKeypress(event) {
          if (event.keyCode === 13) {
            // If the enter key was pressed, blur the element so that change and blur events execute.
            event.target.blur();
          }