If you are getting Uncaught ReferenceError: wc_add_to_cart_params is not defined

General
,
1

if you are getting Uncaught ReferenceError: wc_add_to_cart_params is not defined.
then
If it is a external js file then enqueue it in footer.

function enqueue_custom_script_in_footer() {
    wp_enqueue_script(
        'custom-banner-script', // Handle of the script
        get_template_directory_uri() . '/js/custom-banner.js', // Path to your JS file
        array('jquery'), // Dependencies (e.g., jQuery)
        null, // Version number (optional, null uses the theme version or file modification time)
        true // Load in footer (true = yes, false = no)
    );
}
add_action('wp_enqueue_scripts', 'enqueue_custom_script_in_footer');