Fix CORS policy issue with non-www domain

/**
 * Add the website URL without the www subdomain to the allowed HTTP origins array (fixes CORS issue)
 * Paste this in your active theme's functions.php file.
 * @param array $origins
 * @return array
 */
add_filter( 'allowed_http_origins', function( $origins ) {
    $urls = [admin_url(), home_url()];
    foreach( $urls as $url ) {
        $parsedUrl = parse_url( $url );
        $host = str_replace( 'www.', '', $parsedUrl['host'] );
        $origins[] = 'http://'.$host;
        $origins[] = 'https://'.$host;
    }
    return array_unique( $origins );
});