5 Easy Ways to Display Product and Grand Totals Only

When working with e-commerce platforms or online stores, displaying product and grand totals can be a crucial aspect of providing customers with a clear understanding of their purchase. In various scenarios, developers may need to showcase only the product and grand totals, excluding other details. This requirement can arise in different contexts, such as order summaries, invoices, or cart previews. In this article, we will explore five easy ways to display product and grand totals only, focusing on practical approaches and code examples.

Method 1: Using JavaScript and HTML

One straightforward method to display product and grand totals is by using JavaScript and HTML. You can achieve this by creating a simple HTML structure and then using JavaScript to calculate and update the totals.

<table id="product-table">
  <tr>
    <th>Product</th>
    <th>Price</th>
    <th>Quantity</th>
    <th>Total</th>
  </tr>
  <tr>
    <td>Product 1</td>
    <td>$10.99</td>
    <td>2</td>
    <td>$21.98</td>
  </tr>
  <tr>
    <td>Product 2</td>
    <td>$5.49</td>
    <td>3</td>
    <td>$16.47</td>
  </tr>
</table>

<p id="grand-total"></p>

<script>
  const table = document.getElementById('product-table');
  const rows = table.rows;
  let grandTotal = 0;

  for (let i = 1; i < rows.length; i++) {
    const totalCell = rows[i].cells[3];
    const total = parseFloat(totalCell.textContent.replace('$', ''));
    grandTotal += total;
  }

  document.getElementById('grand-total').textContent = `Grand Total: $${grandTotal.toFixed(2)}`;
</script>

Explanation

In this example, we first retrieve the table element and its rows. We then iterate through each row (excluding the header), extract the total value, and add it to the grand total. Finally, we update the grand total element with the calculated value.

Method 2: Using CSS and HTML

Another approach is to use CSS to hide all table columns except for the ones containing the product and grand totals.

<table id="product-table">
  <tr>
    <th>Product</th>
    <th>Price</th>
    <th>Quantity</th>
    <th>Total</th>
  </tr>
  <tr>
    <td>Product 1</td>
    <td>$10.99</td>
    <td>2</td>
    <td>$21.98</td>
  </tr>
  <tr>
    <td>Product 2</td>
    <td>$5.49</td>
    <td>3</td>
    <td>$16.47</td>
  </tr>
</table>

<style>
  #product-table th:nth-child(1), #product-table td:nth-child(1),
  #product-table th:nth-child(2), #product-table td:nth-child(2),
  #product-table th:nth-child(3), #product-table td:nth-child(3) {
    display: none;
  }
</style>

Explanation

In this example, we use CSS to hide the first three columns (product, price, and quantity) by setting their display property to none. This leaves only the total column visible.

Method 3: Using Server-Side Programming

When working with server-side programming languages like PHP or Python, you can calculate and display the product and grand totals during the data processing stage.

// PHP example
$products = [
  ['name' => 'Product 1', 'price' => 10.99, 'quantity' => 2],
  ['name' => 'Product 2', 'price' => 5.49, 'quantity' => 3],
];

$grandTotal = 0;

foreach ($products as $product) {
  $total = $product['price'] * $product['quantity'];
  $grandTotal += $total;
  echo "Product: {$product['name']}, Total: \${$total:.2f}\n";
}

echo "Grand Total: \${$grandTotal:.2f}";

Explanation

In this example, we iterate through the products array, calculate the total for each product, and add it to the grand total. We then echo the product and grand totals.

Method 4: Using Template Engines

Template engines like Handlebars or Mustache allow you to separate presentation logic from data processing. You can use these engines to display the product and grand totals.

<!-- Handlebars example -->
<table>
  {{#products}}
  <tr>
    <td>{{name}}</td>
    <td>${{total}}</td>
  </tr>
  {{/products}}
</table>

<p>Grand Total: ${{grandTotal}}</p>

Explanation

In this example, we use Handlebars to iterate through the products array and display the product and grand totals.

Method 5: Using JavaScript Libraries

JavaScript libraries like jQuery or Lodash provide utility functions for data processing and DOM manipulation. You can use these libraries to display the product and grand totals.

// jQuery example
const products = [
  { name: 'Product 1', price: 10.99, quantity: 2 },
  { name: 'Product 2', price: 5.49, quantity: 3 },
];

const grandTotal = products.reduce((total, product) => {
  const productTotal = product.price * product.quantity;
  return total + productTotal;
}, 0);

$('#grand-total').text(`Grand Total: $${grandTotal.toFixed(2)}`);

Explanation

In this example, we use jQuery to calculate the grand total and update the grand total element.