Detect Visual Composer

Question

Is there a way to detect if a WordPress page is using Visual Composer?

I have 2 different page templates:

1. Default template for regular pages.
2. Temp

Answer 1

if( defined( 'WPB_VC_VERSION' ) ) { ... }

works like a charm. I was searching for a possibility to hide the Nag screen that occurs when you get the WPBakery Page Builder as a bundeled plugin with a commercial theme to avoid customer's confusion. In case someone could need that snippet:

// hide nag screen of WP Bakery Visual composer if found
if( defined( 'WPB_VC_VERSION' ) ) {
    if(!isset($_COOKIE['vchideactivationmsg_vc11'])) {
        setcookie('vchideactivationmsg', '1', strtotime('+3 years'), '/');
        setcookie('vchideactivationmsg_vc11',  WPB_VC_VERSION, strtotime('+3 years'), '/');
     }
}

Hook that into admin_init and you're good to go!