Promise Utilities

p-limitJavaScript

Limit concurrency when running multiple promise-returning and async functions in Node.js and browsers.

pifyJavaScript

Convert callback-style functions to promises with flexible options for modules, methods, and edge cases.

p-mapJavaScript

Map over promises concurrently with configurable concurrency, error handling, and abort control.

delayJavaScript

A promise-based utility for delaying execution with support for abort signals, random delays, and unlimited timeout lengths.

p-allTypeScript

Run promise-returning and async functions concurrently with configurable concurrency limits.

p-timeoutJavaScript

A utility to add timeout functionality to promises, rejecting or providing a fallback if they take too long.

p-debounceJavaScript

Debounce promise-returning and async functions with configurable leading/trailing edge and abort signal support.

p-wait-forJavaScript

A utility that polls a condition function until it returns true, with configurable intervals, timeouts, and abort signals.

p-tapJavaScript

A utility to tap into promise chains for side effects without affecting the promise value or state.

p-deferJavaScript

Create a deferred promise object with separate resolve/reject functions for advanced promise control patterns.

p-filterJavaScript

Filter promises concurrently with configurable concurrency control.

p-anyJavaScript

Wait for any promise to be fulfilled, with cancellation support and filtering.

p-each-seriesJavaScript

Iterate over promises serially, useful for side-effect operations where order matters.

p-raceJavaScript

An improved Promise.race() with proper empty iterable handling and AbortSignal support.

p-finallyJavaScript

A ponyfill for Promise.prototype.finally() that runs cleanup logic when a promise settles.

p-timesJavaScript

Run promise-returning and async functions a specific number of times concurrently with configurable options.

p-someJavaScript

Wait for a specified number of promises to be fulfilled, useful for getting the fastest results from multiple async operations.

deno-contextTypeScript

A Deno library for propagating deadlines, cancellation signals, and request-scoped values across promises, inspired by Go's context.