From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Optimistically delete a message and notify all users in real time

Optimistically delete a message and notify all users in real time

From the course: Master React 19 and Next.js 16 with Hands-On Projects and Real-World Applications

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Optimistically delete a message and notify all users in real time

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Welcome to this session. We will build a feature that allows a user to delete their own message. The magic here is in the optimistic update. The message will disappear from the user's screen instantly, even before the server confirms the deletion. This creates a superb user experience. Then, we'll use server-sent events to notify all other connected users in real-time, so the deleted message vanishes from their screens too. This combination of optimistic UI on the client and real-time broadcasting from the server is a cornerstone of building dynamic, collaborative applications. Okay, let's add a comment to separate our new functionality – removing a message by its author. Now I am creating the basic structure for our new API endpoint. In Next.js AppRouter API routes, you export functions named after the HTTP method they handle, so delete will handle incoming HTTP delete requests to API slash messages. I've made it an async function because we'll be performing asynchronous operations…

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