facebook_pixel_script.html

<script>
  window.addEventListener("load", function load(event){
    window.removeEventListener("load", load, false);
    if (document.body.className.indexOf('applied') > 0) {
      !function(f,b,e,v,n,t,s){if(f.fbq)return;n=f.fbq=function(){n.callMethod?
      n.callMethod.apply(n,arguments):n.queue.push(arguments)};if(!f._fbq)f._fbq=n;
      n.push=n;n.loaded=!0;n.version='2.0';n.queue=[];t=b.createElement(e);t.async=!0;
      t.src=v;s=b.getElementsByTagName(e)[0];s.parentNode.insertBefore(t,s)}(window,
      document,'script','https://connect.facebook.net/en_US/fbevents.js');
      fbq('init', 'FACEBOOK_PIXEL_ID');
      fbq('track', 'PageView');
      fbq('track', 'AddToWishlist');
    }
  },false);
</script>
<noscript>
  <img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=FACEBOOK_PIXEL_ID&ev=PageView&noscript=1"/>
</noscript>