Form pre-fill on Non Marketo pages with background form submission Background
We use custom forms on non-Marketo pages which then submit to Marketo in the background. This works great and gives us lots of flexibility especially with A/B tests. The team now would like a pre-fill feature for all users. The idea is that if the visitor is known, we should pre-fill the form with their info (name, email, company, e.t.c.). This applies to all types of visitors.
Plan
Previously, I've looked into using _mkto_trk as described in this article: https://developers.marketo.com/blog/external-page-prefill/. In a nutshell, I'd be checking for the existence of that cookie on page load before Munchkin loads and sets a new cookie for the anonymous visit. If it exists, then that would indicate that the user has been cookied in the past. Then I'd go ahead hit the leads db to retrieve the known users info (if known) via Marketo's REST API. In doing this, I'd at least cut down the number of requests made per visit since it'd only happen when the user has been coo
