About the node.js sdk bucket.put

I use couchbase server 5.0 and sync_gateway1.5, web use angular. I have a question. that can node.js sdk has function like PATCH? this very smart for update fields.
thank you!

This API called subdoc. You can get example of it in this blog
Or in the docs https://developer.couchbase.com/documentation/server/5.0/sdk/subdocument-operations.html

thank you for reply.