Open-source alternatives to Task.js

Promises fail silently if you don't attach a .catch() handler.

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

Break out of a promise chain

Create a promise that can be canceled

Conditional promise catch handler

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.

Conditional promise chains

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

Log the value/error of a promise

Map over promises concurrently

Map over promises serially

Memoize promise-returning & async functions

Compose promise-returning & async functions into a reusable pipeline

Create a promise that reports progress