Installation script for Intercom to include current URL as a field on the lead object passed to SFDC

urlCaptureIntercom.js

<script>
/* 
INSTRUCTIONS
To begin syncing this parameters with SFDC you will need to excplitly reference 
them as qualification attributes in your Intercom Qualification Data settings in the Intercom UI:
https://www.intercom.com/help/faqs-and-troubleshooting/capture-qualify-and-convert-leads/what-is-qualification-data
Then, you will need to map those qualification attributes to your SFDC lead fields in the Intercom UI.
See the "Map and sync your qualification attributes" section of this document:
https://www.intercom.com/help/apps-in-intercom/apps/salesforce-app
*/

//Set your APP_ID
var APP_ID = "*** YOUR APP ID ***";

//Instantiate our window.intercomSettings object
window.intercomSettings = {
    app_id: APP_ID
};

try {
  window.intercomSettings["intercom referral URL"] = window.location.href;
}
catch(err) {}


//Then the standard Intercom instantiation script
(function() {
    var w = window;
    var ic = w.Intercom;
    if (typeof ic === "function") {
        ic('reattach_activator');
        ic('update', intercomSettings);
    } else {
        var d = document;
        var i = function() { i.c(arguments) };
        i.q = [];
        i.c = function(args) { i.q.push(args) };
        w.Intercom = i;

        function l() {
            var s = d.createElement('script');
            s.type = 'text/javascript';
            s.async = true;
            s.src = 'https://widget.intercom.io/widget/' + APP_ID;
            var x = d.getElementsByTagName('script')[0];
            x.parentNode.insertBefore(s, x);
        }
        if (w.attachEvent) { w.attachEvent('onload', l); } else { w.addEventListener('load', l, false); }
    }
})()
</script>