Marketo form in Salesforce Partner Community

[SanfordWhiteman]

You don't have to pass the HTTP Referer header (Fetch referrer), though it's harmless to do so.

Pass the data in the form field _mktoReferrer.

Also, are you polyfilling Fetch? And make sure you're encodeURIComponent-ing all those values, Fetch won't do it based just on the Content-Type.

[Luis_Florez1]

I am getting a 400 response code.

Here is the updated code based on your recommendations:

let params = [
            'formid=1131',
            'formVid=1131',
            'munchkinId=' + encodeURIComponent('XXXXXXX'),
            'FirstName=' + encodeURIComponent(this.userRecord.data.fields.FirstName.value),
            'LastName=' + encodeURIComponent(this.userRecord.data.fields.LastName.value),
            'Email=' + encodeURIComponent(this.userRecord.data.fields.Email.value),
            '_mktoReferrer=' + encodeURIComponent(document.location.href)
        ];
        fetch('https://XXXXXX.marketo.com/index.php/leadCapture/save2',
        {
            method: 'POST',
            body: params.join('&'),
            headers:{
                'content-type': 'application/x-www-form-urlencoded'
            }
        }).then(result => {
            console.log('result from registration');
            console.log(result);
        });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Thanks in advance for all your help.

[SanfordWhiteman]

Come to think of it, Fetch can't be used for this  at all because it's a blocked CORS request. Use a standard form post. 

[Luis_Florez1]

Thank a lot.

The JS code actually worked. The form I was using was deleted while I was testing and I didn't see the error message then, but it was actually returning an error message about the form.

Many many thanks for your help.

[Mark_Wright]

I am wondering if it would be possible to build a custom lightning component or something like that? Or a visualforce page?

[SanfordWhiteman]

Possible? Yes. Has anyone proven it with fully working code?  Don't think so.

[Mark_Wright]

Yeah I did it on a test community we have and it seemed to work ok, we havent put it on the live site yet though