Get the UTM parameters form the URL as custom attributes in Intercom

intercom.js

// Get UTM Params
var querystring = document.location.search; // Get the string after the domain

querystring = querystring.substring(1); // Remove the leading "?"
querystring = querystring.split('&'); // Split the string in utm variables

var utms = {};

for (var i = 0; i < querystring.length; i++) {

    var utm_part = querystring[i];

    if (utm_part) {
        var keyValue = utm_part.split("=");
        console.log("keyvalue: " + keyValue);

        if (keyValue.length > 1) {
          utms[keyValue[0]] = keyValue[1];
        }
    }
}

// END Get UTM Params

var settings = {
    app_id: app_id,
    email: 'jane.doe@example.com',
    created_at: 1234567890,
    name: 'Jane Doe',
    user_id: '9876123'
}

// Add UTM parameters to the Intercom object if they are not null
if (utms["utm_campaign"]) { settings.utm_campaign = utms["utm_campaign"]; }
if (utms["utm_medium"]) { settings.utm_medium = utms["utm_medium"]; }
if (utms["utm_source"]) { settings.utm_source = utms["utm_source"]; }

Intercom('boot', settings);