Скачать или смотреть Optimizing SWR with Optimistic UI for Karaoke App Performance

Discover how to implement `optimistic UI` in your SWR-based karaoke app to enhance user experience and performance.
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Enhancing Performance in Your Karaoke App with SWR Optimistic UI

Building an engaging karaoke app requires not only great functionality but also a smooth user experience. When it comes to fetching data efficiently, you might run into performance issues, especially if your app relies heavily on user interactions. If you’re using SWR (stale-while-revalidate) for data fetching in a Next.js environment, implementing optimistic UI might be the key to solving these issues. This guide will take you through understanding the problem and the solution to enhance the performance of your app.

The Problem

In a practical scenario, consider you are developing a karaoke app where users can sign up to sing over various songs. Each time a song is played, it should be marked accordingly in real-time. While developing locally, all functionalities might work seamlessly, but the performance becomes sluggish once the app is deployed. The primary culprit is revalidation delays – each interaction requiring a call to the server to update the UI, which is inefficient and frustrating for users.

Current Implementation

Your current method entails the following:

When a song is played, it invokes an API call to update the song's status in a MongoDB database.

The app relies on the server to fetch the current state of the song to re-render.

The UI tends to lag because users are left waiting for the server responses.

The Solution: Implementing Optimistic UI

By leveraging SWR’s optimistic mutation capabilities, you can enhance the perceived performance of your app by preemptively updating the UI without waiting for the server response.

Step-by-Step Guide to Optimistic Update

Fetch with SWR: Ensure you're using SWR's mutate function for local updates.

Create your mutation function: This function will handle the optimistic update without waiting for the server response. Here's an effective implementation:

[[See Video to Reveal this Text or Code Snippet]]

Call the mutation function: Trigger this function each time a user interacts with the UI. For instance, from a button click:

[[See Video to Reveal this Text or Code Snippet]]

Benefits of This Implementation

Immediate Feedback: Users see the results of their action right away since the UI is updated locally first, before the server confirms the change.

Reduced Latency: By circumventing the need to wait for a revalidation, the perceived speed of the application increases dramatically.

User Experience Enhancement: A smoother UI contributes to better overall satisfaction, encouraging user interaction.

Conclusion

Implementing optimistic UI in your SWR-based karaoke app can greatly enhance performance and user experience. By reducing reliance on server calls for every interaction, your app will feel more responsive and engaging. Remember that the implementation of optimistic UI should be accomplished with care, ensuring that your state holds true to the server-side data. This adjustment not only improves performance but fosters a more enjoyable atmosphere for your karaoke users. Let’s sing to that!