Retrieves an extended field.
The getExtendedField() function returns a Promise
that resolves when the extended field is retrieved.
Note:
Only visitors with
Manage Contacts permissions
can retrieve extended fields.
You can override the permissions by setting the suppressAuth option to true.
Extended field ID .
When accessing contact data,
extended field values are available at extendedFields[key].
For example, if the key is "custom.notes",
the value can be accessed at extendedfields["custom.notes"].
Once set, key cannot be modified, even if displayName changes.
Authorization options.
This method doesn’t return any custom errors, but may return standard errors. Learn more about standard Wix errors.