Capturing Lead Info From External Form

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For some, to capture all other usual lead data. 

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Well, if you sometimes need to do this, your code must support it. Doesn’t matter if it’s not always used!

The approach is to

• listen for the visible form’s submit event
• preventDefault()
• pass the visible form’s values to a hidden Marketo form
• listen for the Marketo form’s success event
• submit the hidden Marketo form
• in the Marketo onSuccess, POST to the visible form’s original destination

An example of the logic is here:

HTML :: Vanilla HTML <form> to hidden Marketo form (with HTML submit)

Naturally your developer needs to be familiar with the nuances of such DOM form and Marketo form events.

Also, this demo assumes the visible form is using native <form> submit handling. If it has its own custom handler, you need to short-circuit that logic and then continue with the same pattern (Marketo form, onSuccess, then visible form).