How to Make Sidebar Items Active for the Current Product in WooCommerce?

Active Sidebar Item for Current Product in WooCommerce

Adding a sidebar to your WooCommerce product detail page is one way to enhance user experience. However, you may encounter the challenge of identifying the current product and displaying an "active" class accordingly.

Obtaining the Current Product ID

To add an "active" class to the currently selected product in the sidebar, you need to get the ID of the current product. In WooCommerce versions prior to 3.0, you could access the product ID using the following code:

echo get_the_ID();

However, in WooCommerce 3.0 and later, you need to use this modified code:

global $product;
$id = $product->get_id();

This code accesses the product using the global $product variable and then retrieves its ID using the get_id() method.

Adding the "Active" Class

Once you have the current product ID, you can compare it to the product ID in the sidebar and add the "active" class if they match. Here's an example:

This code compares the product ID obtained earlier ($id) to the ID of the current sidebar item ($li). If they match, it adds the "active" class to the 
 element.
By implementing this code, you can effectively display an "active" class for the sidebar item corresponding to the currently selected product in your WooCommerce theme.
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