How to process JSON asynchronously?

Question

Node.js

I receive JSON data from websocket (via pusher node js), then I process it and set conditions. How can this be done asynchronously? Those. for example, 2 options come, at the same time, according to the conditions, both are suitable and I need to send a request for both options and get an answer instantly, and not wait until the 1st request passes, then the second one starts