How can I access the visitor’s country in JavaScript?

You can make the visitor’s location available in JavaScript by retrieving the geolocation data in PHP and passing it to a JavaScript variable.

Add the following code to your theme’s functions.php file:

add_action('wp_enqueue_scripts', function(){
    if(!defined('IFSO_PLUGIN_BASE_DIR')) return;
    require_once(IFSO_PLUGIN_BASE_DIR. 'services/geolocation-service/geolocation-service.class.php');
    $geo_data = \IfSo\Services\GeolocationService\GeolocationService::get_instance()->get_user_location();
    $ifso_country = !empty($geo_data->get('countryCode')) ? $geo_data->get('countryCode') : '';
    if(function_exists('wp_add_inline_script'))
        wp_add_inline_script('if-so',"var ifso_country = '{$ifso_country}';",'after');
});

This will expose the visitor’s country as a JavaScript variable named ifso_country, which you can use in your scripts.

You can adapt this approach to expose other geolocation values, such as city or state, by adjusting the data retrieved in the code.