Webhooks REACT/ASP.NET Developer NEEDED RIGHT NOW

I have a signalr reactJS project that is utilizing webhooks. the 3 features needed for this on the frontend is a locking feature that locks out two users from clicking on the same document, a notification symbol, and thats it. this needs to be done today. Backend is already built with the signalr hub connecting to the backend and api created. Just need the frontend of this webhook connection made.