@jpwilliams/waitgroup

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A tiny version of Golang's WaitGroup for Node.js and the browser with typings, promises, and zero dependencies.

``sh
npm install @jpwilliams/waitgroup
`

`ts
import http from "http";
import { WaitGroup } from "@jpwilliams/waitgroup";

async function main() {
const wg = new WaitGroup();

const urls = [
"http://www.golang.org/",
"http://www.google.com/",
"http://www.somestupidname.com/",
];

urls.forEach((url) => {
// Increment the WaitGroup counter
wg.add(1);
// Fetch the URL
http.get(url, () => {
// Decrement the counter when the GET is complete
wg.done();
});
});

// Wait for all HTTP fetches to complete
await wg.wait();
}

main();
`

For most applications in Node.js, using built-ins like Promise.all` will work perfectly, but sometimes this can be a really nice abstraction if the promises you have to keep track of are pretty spread out.

See jpwilliams/waitgroup-deno for a Deno version.