Limit

  handleLimit(elem) {
    const { product } = this.props;
    const qtyOrdered = cartItem ? cartItem.qty_ordered : 0;
    // Checks the difference of the Inventory and Quantity Ordered
    const inventoryOrderDifference = product.quantity - qtyOrdered;
    const max_chars = inventoryOrderDifference.toString().length;

    if(this.state.qty.toString().length > max_chars) {
        elem = elem.value.substr(0, max_chars);
    }
  }