Solution:1
only for WPBakery Page Builder
Actually, _wpb_vc_js_status
since 4.8 is not correct, because it was not used anymore. The simplest way to check if page is using wpbakery – it is check for vc_row
shortcode in content.
$post = get_post();
if ( $post && preg_match( '/vc_row/', $post->post_content ) ) {
// Visual composer works on current page/post
}