Ruby on Rails - different jQuery results in development and production for adblock message

Question

In my application I added some jQuery codes to show a message when user has adblock on. In my development ENV I can see the message, but with same code in production ENV it doesn't work/do the same thing.

Here is my code

var canRunAds = true;
  function hallo(){
    $("#showmsg").html("<p>You are using adblock</p>");
  }
  if( window.canRunAds === undefined ){
    hallo();
  }

I even created a file called showads.js and included it to my head with var canRunAds = true; but in production it changes to var canRunAds != 0; for reasons.

How can I get it to work or is it something I do wrong?

Answer 1

Here is how I got it to work. Changed showads.js to ads.js and added code blow to footer.

  $(document).ready(function(){
    if( window.canRunAds === undefined ){
        $("#showmsg").html("<p>You are using adblock</p>");
    }
  });

It looked like adblock didn't block showads.js but ads.js