<body>of your page HTML:
domainconfiguration variables in the above snippet should be assigned to your Chartbeat account id and site id, respectively.
useCanonicalDomainsettings for our tracker to collect the canonical URL from your page HTML, your Facebook IA Chartbeat code should send the same canonical URL via the
pathconfiguration variable. For example, if an article's canonical URL is
https://mysite.com/news/article-xyz.html, the path variable should be populated as follows in that page's Facebook Instant Article HTML: