"Modern web applications are increasingly sensitive to when work happens, not just what work happens. User input, scroll events, analytics tracking, and API requests all compete for time on the main thread. When timing is poorly managed, the result is often jank, duplicated requests, or subtle race conditions that are difficult to debug. This guide walks through building a Pinterest-style infinite scroll image gallery using React and TanStack Pacer."
"RxJS is a strong fit for modeling complex event streams, but many UI performance issues do not require a full reactive abstraction. TanStack Pacer targets common timing problems in frontend apps and does so with a smaller mental and runtime footprint. Lower learning curve: RxJS requires adopting the Observable mental model. With Pacer, you call a function or a hook. Smaller bundle size: Pacer is lightweight and tree-shakeable. Automatic cleanup on unmount: No manual subscription management. React-friendly ergonomics: Works naturally with React's unidirectional data flow. TypeScript-first: Strong type inference out of the box."
A Pinterest-style infinite scroll image gallery is built using React and TanStack Pacer. Pacer utilities such as debouncing, throttling, batching, and rate limiting are applied to manage when work happens and reduce main-thread contention. Proper timing prevents jank, duplicated requests, and subtle race conditions that are difficult to debug. TanStack Pacer emphasizes a lower learning curve, smaller bundle size, automatic cleanup on unmount, React-friendly ergonomics, and TypeScript-first design compared with heavier reactive libraries. Includes guidance on choosing the correct Pacer utility for a timing problem, integrating it into React cleanly, and avoiding brittle edge cases from hand-rolled timing logic.
Read at LogRocket Blog
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