queue-cb

library1.6.6jsnpmunverified

A lightweight, scalable queue for managing parallel callbacks in Node.js, similar to d3-queue but without accumulating results in memory. The current stable version is 1.6.6, released with a focus on minimal overhead and support for callback-based concurrency. It ships TypeScript definitions and works with Node >=0.8. A key differentiator is its lack of result accumulation, making it suitable for fire-and-forget parallel tasks where you only need to know when all tasks complete or receive an error.

testing

npm install queue-cb

github ↗package ↗homepage ↗

INSTALL

IMPORT

SIG · QUEUE-CB

queue-cb

testingjavascriptv1.6.6

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

Queue

✓ import { Queue } from 'queue-cb'

✗ const Queue = require('queue-cb');

ESM import works since TypeScript types are provided, but the package is still CommonJS internally; default export style may also work with older bundlers.

default import

✓ import Queue from 'queue-cb'

Some bundlers may allow default import; for consistency, prefer named import.

require (CJS)

✓ const Queue = require('queue-cb');

CommonJS require is supported; the default export is the Queue constructor.

Creates a queue, defers two async tasks, and waits for all to complete without accumulating results.

import { Queue } from 'queue-cb'; function delayedHello(callback) { setTimeout(() => { console.log('Hello!'); callback(null); }, 250); } const q = new Queue(); q.defer(delayedHello); q.defer(delayedHello); q.await((error) => { if (error) throw error; console.log('Goodbye!'); });

Debug

Known issues

gotchaThe queue does not accumulate results; if you need to collect return values, use a different library like d3-queue or async.queue.

fix

Manually accumulate results inside callbacks or use a library with result accumulation.

affects: >=1.0

gotchaThe 'await' method only provides the first error; if multiple tasks error, only the first one is passed.

fix

Wrap each task's callback to collect all errors if needed.

affects: >=1.0

Errors

Common errors & fixes

TypeError: queue_cb_1.Queue is not a constructor

Incorrect import style or ESM/CJS mismatch.

fix

Use `import { Queue } from 'queue-cb'` for ESM or `const Queue = require('queue-cb')` for CommonJS.

Upgrade

Version history

1.6.6latest on npm

Audit

Dependencies

No dependency data recorded yet.

Agent activity

4 hits · last 30 days

node

Resources

githubssh://git@github.com/kmalakoff/queue-cb ↗

packagequeue-cb ↗

homepagehttps://github.com/kmalakoff/queue-cb ↗