#ORDER-BOOK
Kept it very simple.
Techs: Redux Saga(Event Channel) Redux React Websockets React-Scripts (For Scaffolding It). we can use webpack externally for production rated apps. Docker Heroku
Simply select instrument value from dropdown , then load orders. Once you selected instrument load order button wil get disabled. To enable it reselect new intsrument again.
Kept it in a way like it does not make any new websocket connection for new instrument & also if user select same instrument again it does not send any call to backend since it is already selected.
Once it select new instrument , it un subscriibe first one then subscribe new one.