How would I put multiple Facebook tracking pixels on one web page?

Question

We are trying to use Facebook's Ad tracking pixels to track ads. we looked at Facebook's documentation and that led me no where.

I need to know how to trigger multiple Facebook pixels on one page because we have multiple ads running.

I took the code that it gave me per pixel and placed it on the page and then we have a Cart page in which I fire or add the 'Purchase' event. But since I have the script 3 times it seems to fire 3 times. I want it to fire once per pixel.

This is what I have so far:

<!-- Facebook Pixel Code - Ad 1-->
 <script>
 !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','//connect.facebook.net/en_US/fbevents.js');

 fbq('init', 'xxxxxxxxxxxxx12');
 fbq('track', "PageView");
 // Purchase
 // Track purchases or checkout flow completions (ex. landing on "Thank You" or confirmation page)
 fbq('track', 'Purchase', {value: '1.00', currency: 'USD'});
 </script>
 <noscript><img height="1" width="1" style="display:none"
 src="https://www.facebook.com/tr?id=xxxxxxxxxxxxx12&ev=PageView&noscript=1"
  /></noscript>
<!-- End Facebook Pixel Code -->

 <!-- Facebook Pixel Code - Ad 2-->
 <script>
 !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','//connect.facebook.net/en_US/fbevents.js');

 fbq('init', 'xxxxxxxxxxxxx34');
 fbq('track', "PageView");
 // Purchase
 // Track purchases or checkout flow completions (ex. landing on "Thank You" or confirmation page)
 fbq('track', 'Purchase', {value: '1.00', currency: 'USD'});

 </script>
 <noscript><img height="1" width="1" style="display:none"
 src="https://www.facebook.com/tr?id=xxxxxxxxxxxxx34&ev=PageView&noscript=1"
  /></noscript>
<!-- End Facebook Pixel Code -->

 <!-- Facebook Pixel Code - Ad 2-->
 <script>
 !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','//connect.facebook.net/en_US/fbevents.js');

 fbq('init', 'xxxxxxxxxxxxx56');
 fbq('track', "PageView");
 // Purchase
 // Track purchases or checkout flow completions (ex. landing on "Thank You" or confirmation page)
 fbq('track', 'Purchase', {value: '1.00', currency: 'USD'});
 </script>
 <noscript><img height="1" width="1" style="display:none"
 src="https://www.facebook.com/tr?id=xxxxxxxxxxxxx56&ev=PageView&noscript=1"
  /></noscript>
<!-- End Facebook Pixel Code -->

Is this the way to do it? Or do I need to do something different so that the Purchase event does not get fired 4 times. I am using the FB Pixel Helper plugin for Chrome to make sure all pixels are firing, but I am getting an error that they are firing multiple times.

Would I do something like this?

 <!-- Facebook Pixel Code - ALL ADS-->
 <script>
 !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','//connect.facebook.net/en_US/fbevents.js');

 fbq('init', 'xxxxxxxxxxxxx12');
 fbq('init', 'xxxxxxxxxxxxx34');
 fbq('init', 'xxxxxxxxxxxxx56');
 fbq('track', "PageView");
 // Purchase
 // Track purchases or checkout flow completions (ex. landing on "Thank You" or confirmation page)
 fbq('track', 'Purchase', {value: '1.00', currency: 'USD'});
 </script>
 <noscript><img height="1" width="1" style="display:none"
 src="https://www.facebook.com/tr?id=xxxxxxxxxxxxx12&ev=PageView&noscript=1"
  /></noscript>
<!-- End Facebook Pixel Code -->

Answer 1

One other solution would be just to use the no-javascript approach if you want to track only certain events for certain pixel IDs

You can see some examples in their docs: https://developers.facebook.com/docs/facebook-pixel/api-reference

<img height="1" width="1" style="display:none"
src="https://www.facebook.com/tr?id=FB_PIXEL_ID&amp;ev=MyCustomEvent&amp;cd[custom_param]=custom_value"
/>

<img height="1" width="1" style="display:none"
src="https://www.facebook.com/tr?id=FB_PIXEL_ID&amp;ev=PageView&amp;noscript=1"
/>

You just need to get the parameter formatting right.