I am trying to figure out how to pass a value to the custom envelope field I have created. I am currently using the new JS SDK. I am able to pass a value to a custom field for my document but am unsure how to do this for an envelope custom field.
data-powerform-fields="signer_UserName=firstname%lastname&signer_Email=ada@example.com&signer_acknowledgement=Read
and accepted." src="//developers.docusign.com/js/docusign.js"></script>
SDK is simply an API helper. Whatever is available in the API is converted to JS SDK and for the moment JS SDK seems to be available only in beta: https://www.docusign.com/blog/developers/introducing-our-javascript-sdk-docusignjs