How to pass utm parameters from a cookie into hidden fields?

[zangerine1]

Hi,

I have been trying to find the best solution for passing data stored in a cookie into hidden form fields via GTM.

Here's an example of how I want it to work:

• A user clicks on a paid advertisement and visits my site. The user has a utm_source value of facebook.
• The utm_source value is stored in a cookie. 
• The user navigates around my website and submits a form.
• On my form, there is a hidden field named "utm_source".
• When the user submits a form, I want the pass the value from the cookie into the hidden form field.

I was able to do this for a while by setting the field attribute "value", but recently HubSpot has not been recognizing my GTM script. 

Anyone know how to pass the utm data from a cookie into a hidden field? Would love some help on this!

[karstenkoehler]

Hi @zangerine1,

Does this help?

[How-To] Pass Values into Hidden Fields from Google Tag Manager

Best regards!

[Chris_Matt]

Thanks for the guide. Unfortunately, this solution didn't work for me. They form listener never recognizes that the HubSpot form has loaded.