@sapphire/async-queue

Sequential asynchronous lock-based queue for promises.

Table of Contents

• Features
• Installation
• Usage
• Buy us some doughnuts
• Contributors

Features

• Written in TypeScript
• Bundled with esbuild so it can be used in NodeJS and browsers
• Offers CommonJS, ESM, and UMD bundles
• Fully tested

Installation

You can use the following command to install this package, or replace npm install with your package manager of choice.

npm install @sapphire/async-queue

Usage

Note: While this section uses require, the imports match 1:1 with ESM imports. For example const { AsyncQueue } = require('@sapphire/async-queue') equals import { AsyncQueue } from '@sapphire/async-queue'.

// Require the AsyncQueue class
const { AsyncQueue } = require('@sapphire/async-queue');

const queue = new AsyncQueue();

async function request(url, options) {
	// Wait and lock the queue
	await queue.wait();

	try {
		// Perform the operation sequentially
		return await fetch(url, options);
	} finally {
		// Unlock the next promise in the queue
		queue.shift();
	}
}

request(someUrl1, someOptions1);
// Will call fetch() immediately

request(someUrl2, someOptions2);
// Will call fetch() after the first finished

request(someUrl3, someOptions3);
// Will call fetch() after the second finished

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Buy us some doughnuts

Sapphire Community is and always will be open source, even if we don't get donations. That being said, we know there are amazing people who may still want to donate just to show their appreciation. Thank you very much in advance!

We accept donations through Open Collective, Ko-fi, PayPal, Patreon, and GitHub Sponsorships. You can use the buttons below to donate through your method of choice.

Donate With	Address
Open Collective	Click Here
Ko-fi	Click Here
Patreon	Click Here
PayPal	Click Here

Contributors

Please make sure to read the Contributing Guide before making a pull request.

Thank you to all the people who already contributed to Sapphire!