Contact Form 7 Load CSS Js only when needed

add_action('wp_enqueue_scripts', 'customize_cf7_dequeue');

function customize_cf7_enqueue($content)
{
    if (has_shortcode($content, 'contact-form-7') && function_exists('wpcf7_enqueue_styles')) {
        $content = '<link href="' . esc_url(wpcf7_plugin_url('includes/css/styles.css') . '?ver=' . WPCF7_VERSION) . '" rel="stylesheet" type="text/css">' .
            $content;
        wpcf7_enqueue_scripts();
    }
    return $content;
}

add_filter('the_content', 'customize_cf7_enqueue');