Open-source alternatives to P Memoize

By default, promises fail silently if you don't attach a .catch() handler to them.

Make an asynchronous function synchronous

Run promise-returning & async functions concurrently with optional limited concurrency

Wait for any promise to be fulfilled

Create a promise that can be canceled

Debounce promise-returning & async functions

Create a deferred promise

Iterate over promises serially

Promisify an event by waiting for it to be emitted

Filter promises concurrently

Deprecated as it's now available in all modern browsers and Node.js versions.

Check if something is a promise

Create a lazy promise that defers execution until it's awaited or when .then() or .catch() is called

Run multiple promise-returning & async functions with limited concurrency

Map over promises concurrently

Map over promises serially

Compose promise-returning & async functions into a reusable pipeline

Create a promise that reports progress

Like Promise.all() but for Map and Object

p-queue is a JavaScript promise queue and concurrent task scheduler designed to limit the number of active asynchronous operations. It serves as an asynchronous rate limiter and promise lifecycle manager to prevent resource exhaustion. The project distinguishes itself through priority-based task scheduling and token-bucket rate limiting to control execution frequency. It integrates with abort signals for task cancellation and provides mechanisms to pause, resume, and clear pending operations. The tool covers broader traffic management capabilities including operation timeouts and concurrency

A better Promise.race()

Reduce a list of values using promises into a promise for a value

Make a promise always fulfill with its actual fulfillment value or rejection reason