Скачать или смотреть Optimize Ajax Requests Without Freezing the UI

Learn how to efficiently handle multiple `Ajax` requests to boost performance, improve user experience, and prevent UI freezing.
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This video is based on the question https://stackoverflow.com/q/68477796/ asked by the user 'gleisin-dev' ( https://stackoverflow.com/u/11944017/ ) and on the answer https://stackoverflow.com/a/68477908/ provided by the user 'Bravo' ( https://stackoverflow.com/u/10549313/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Optimize Ajax Requests Without Freezing the UI: A Step-by-Step Guide

When dealing with multiple Ajax requests in JavaScript, you may encounter a common problem: the user interface freezes until all requests are completed. This can lead to a frustrating user experience and can hinder your application's performance. In this guide, we will explore how to manage Ajax requests effectively to ensure the UI remains responsive while displaying results dynamically.

The Problem: Enthusiastic For Loop

In many applications, developers may use a for loop to send multiple Ajax requests in quick succession. Here's a simplified example:

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

The issue with this approach is straightforward: as long as the for loop is running, the browser's UI remains unresponsive. Users will not see any responses until the loop finishes, which can take a significant amount of time depending on the number of requests.

The Solution: Sequential Requests

To solve this problem, we need a method that allows us to wait for each request to complete before moving on to the next. This can be accomplished with a recursive function that calls $.ajax one by one:

Implementation

Here's a clean and efficient approach to achieving this:

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

Benefits of This Method

Non-blocking: The UI remains responsive even as new data is fetched.

Order Guarantee: The results are displayed in the same order the requests are made.

Advanced: Firing Multiple Requests with Control

If you prefer to send multiple requests simultaneously while managing the UI responsiveness, you can tweak the above recursive method. This allows you to define how many requests to send at once while still keeping performance in check.

Implementation

Here's an advanced method that allows you to fire a defined number of requests simultaneously:

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

Key Points to Consider

Flexibility: You can adjust the number of simultaneous requests to find the right balance for your application.

Order Handling: If maintaining the order of results isn't critical, this method works perfectly.

Conclusion

Handling multiple Ajax requests efficiently is crucial for providing a smooth user experience. By implementing either of the strategies discussed, you can prevent UI freezing and ensure a responsive interface. Experiment with these solutions and adjust them according to your specific application needs to find what best fits your use case.

Final Thoughts

By optimizing your Ajax requests, not only do you enhance performance, but you also improve user satisfaction. Keep your UI responsive, and users will appreciate the seamless flow of information. Happy coding!