Overview

TanStack Pacer is a library focused on providing high-quality utilities for controlling function execution timing in your applications. While similar utilities exist elsewhere, we aim to get all the important details right - including type-safety, tree-shaking, and a consistent and intuitive API. By focusing on these fundamentals and making them available in a framework agnostic way, we hope to make these utilities and patterns more commonplace in your applications. Proper execution control is often an afterthought in application development, leading to performance issues, race conditions, and poor user experiences that could have been prevented. TanStack Pacer helps you implement these critical patterns correctly from the start!

Many of the ideas (and code) for TanStack Pacer are not new. In fact, many of these utilities have been living in other TanStack libraries for quite some time. We extracted code from TanStack Query, Router, Form, and even Tanner's original Swimmer library. Then we cleaned up these utilities, filled in some gaps, and shipped them as a standalone library.

• Debouncing
  • Delay functions execution until after a period of inactivity
  • Synchronous or Asynchronous Debounce utilities with promise support and error handling
• Throttling
  • Limit the rate at which a function can fire
  • Synchronous or Asynchronous Throttle utilities with promise support and error handling
• Rate Limiting
  • Limit the rate at which a function can fire
  • Synchronous or Asynchronous Rate Limiting utilities with promise support and error handling
• Queuing
  • Queue functions to be executed in a specific order
  • Choose from FIFO, LIFO, and Priority queue implementations
  • Control processing with configurable wait times or concurrency limits
  • Manage queue execution with start/stop capabilities
  • Synchronous or Asynchronous Queue utilities with promise support and success, settled, and error, handling
• Comparison Utilities
  • Perform deep equality checks between values
  • Create custom comparison logic for specific needs
• Convenient Hooks
  • Reduce boilerplate code with pre-built hooks like useDebouncedCallback, useThrottledValue, and useQueuerState, and more.
  • Multiple layers of abstraction to choose from depending on your use case.
• Type Safety
  • Full type safety with TypeScript that makes sure that your functions will always be called with the correct arguments
  • Generics for flexible and reusable utilities
• Framework Adapters
  • React, Solid, and more
• Tree Shaking
  • We, of course, get tree-shaking right for your applications by default, but we also provide extra deep imports for each utility, making it easier to embed these utilities into your libraries without increasing the bundle-phobia reports of your library.