Executing function when product category or title change

Hi @termi

To execute a function when a product category is added to a product in WooCommerce, you can use the wp_set_object_terms hook. This hook is called when terms are set for a specific object (in this case, a product). You can use it to trigger a function when a product’s categories are updated.

Here is an example of how you can use this hook:

function my_function_when_product_category_added( $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids ) {
   // your code here
}

add_action( 'wp_set_object_terms', 'my_function_when_product_category_added', 10, 6 );

To execute a function when a product title changes in WooCommerce, you can use the wp_insert_post hook. This hook is called when a post is created or updated, so you can use it to trigger a function when a product’s title is updated.

Here is an example of how you can use this hook:

function my_function_when_product_title_changed( $post_ID, $post, $update ) {
   // your code here
}

add_action( 'wp_insert_post', 'my_function_when_product_title_changed', 10, 3 );

These hooks should be placed in your child theme’s functions.php file or in a custom plugin.

I hope this helps! Let me know if you have any questions or need further assistance.

Hi @termi

It is impossible to use JavaScript to directly monitor changes to a product’s title or categories on a WooCommerce website, as the code would not have access to the server-side data stored in the database. However, when the product’s title or categories are updated, you can use JavaScript to detect changes to the DOM (Document Object Model). For instance, you can use JavaScript to listen for changes to the elements that display the product’s title or categories on the page and then trigger an alert or some other action when those elements are modified.

Here is an example of how you could use JavaScript to detect changes to the product’s title element and trigger an alert:

// Select the product title element
const productTitle = document.querySelector('.product_title');

// Create a new MutationObserver to listen for changes to the product title element
const observer = new MutationObserver(function(mutations) {
    // Loop through the list of mutations
    mutations.forEach(function(mutation) {
        // Check if the text content of the product title element has changed
        if (mutation.type === 'characterData') {
            // Trigger the alert if the text content has changed
            alert('The product title has changed!');
        }
    });
});

// Start observing the product title element
observer.observe(productTitle, {
    characterData: true,
    subtree: true
});

This code will create a MutationObserver that listens for changes to the product title element and will trigger an alert when the element’s text content is changed.

You can use a similar approach to listen for product category changes. Select the element that displays the categories, and use a MutationObserver to listen for changes to the element’s content.

Issue 2:

Yes, you can use the $taxonomy parameter passed to the wp_set_object_terms hook function to check the taxonomy of the added terms.

You can modify your hook function only to execute your code if the taxonomy is ‘product_cat’, like this:

function my_function_when_product_category_added( $object_id, $terms, $tt_ids, $taxonomy, $append, $old_tt_ids ) {
    if ( 'product_cat' === $taxonomy ) {
        // your code here
    }
}
add_action( 'wp_set_object_terms', 'my_function_when_product_category_added', 10, 6 );

This will ensure that your function is only triggered when categories are added to the product rather than when any terms are added.

I hope this helps! Let me know if you have any other questions.