Moving beyond RxJS: A guide to TanStack Pacer

Modern web applications often face performance challenges related to the timing of tasks such as user input, scroll events, and API requests, which can lead to problems like jank and race conditions. The guide explores constructing a Pinterest-style infinite scroll image gallery using React and TanStack Pacer, a library designed to manage async event timing with utilities like debouncing, throttling, batching, and rate limiting. Unlike RxJS, which is suited for complex reactive scenarios, Pacer offers a lightweight alternative that integrates seamlessly with React and helps avoid the complexity of reactive programming. The guide provides step-by-step instructions on setting up a React project with Pacer, using the library's utilities to optimize UI performance, and demonstrating their effectiveness through practical examples. By the end, users gain insights into choosing appropriate Pacer utilities to solve timing issues without the overhead of reactive abstractions, offering a pragmatic solution for frontend developers seeking efficient and maintainable code.