Code to return single product details based on the ID

view_single_product.js

Product.findOne({ _id: req.params.productId }).exec((error, result) => {
    if (error) {
      res.json({ status: 'ERROR', message: 'Error getting product' });
    }

    if (result) {
      res.json({
        status: 'SUCCESS',
        message: 'Product found',
        product: result,
      });
    } else {
      res.json({ status: 'NO_PRODUCT', message: 'No product with specified product ID found' });
    }
  });