Hubspot Tracking Script Async & Defer

A major drawback to the Hubspot Tracking script is that it slows down the initial webpage load time by a second or more.

This collects all of the information for the plugin after it loads.

I found a version of this on corwebvitals.io, but it wasn’t working for my version of Hubspot, so I fixed it.

// Hubspot Forms Defer Script ** FIXED **
// Source: https://www.corewebvitals.io/pagespeed/defer-hubspot-forms
// Original
// Source: https://app.hubspot.com/settings/4449000/analytics-and-tracking/tracking
// Replaced script with the one provided by Hubspot from the form's "share" button.
function hubspot_header() {
   ?>