p-limit

Run multiple promise-returning & async functions with limited concurrency

Install

$ npm install --save p-limit

Usage

const pLimit = require('p-limit');

const limit = pLimit(1);

const input = [
    limit(() => fetchSomething('foo')),
    limit(() => fetchSomething('bar')),
    limit(() => doSomething())
];

// only one promise is run at once
Promise.all(input).then(result => {
    console.log(result);
});

API

pLimit(concurrency)

Returns a limit function.

concurrency

Type: number
Minimum: 1

Concurrency limit.

limit(fn)

Returns the promise returned by calling fn.

fn

Type: Function

Promise-returning/async function.

Related

• p-queue - Promise queue with concurrency control
• p-throttle - Throttle promise-returning & async functions
• p-debounce - Debounce promise-returning & async functions
• p-all - Run promise-returning & async functions concurrently with optional limited concurrency
• More…

License

MIT © Sindre Sorhus