# each-async

**Repository Path**: mirrors_silverwind/each-async

## Basic Information

- **Project Name**: each-async
- **Description**: Async concurrent iterator (async forEach)
- **Primary Language**: Unknown
- **License**: MIT
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-25
- **Last Updated**: 2026-08-16

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# each-async [![Build Status](https://travis-ci.org/sindresorhus/each-async.svg?branch=master)](https://travis-ci.org/sindresorhus/each-async)

> Async concurrent iterator (async forEach)

Like [async.each()](https://github.com/caolan/async#eacharr-iterator-callback), but tiny.

I often use `async.each()` for doing async operations when iterating, but I almost never use the other gadzillion methods in `async`.

Async iteration is one of the most used async control flow patterns.


## Install

```
$ npm install --save each-async
```


## Usage

```js
const eachAsync = require('each-async');

eachAsync(['foo','bar','baz'], (item, index, done) => {
	console.log(item, index);
	done();
}, error => {
	console.log('finished');
});
//=> 'foo 0'
//=> 'bar 1'
//=> 'baz 2'
//=> 'finished'
```


## API

### eachAsync(input, callback, finishedCallback)

#### input

Type: `Array`

Array you want to iterate.

#### callback(item, index, done)

Type: `Function`

Called for each item in the array with the following arguments:

- `item`: the current item in the array
- `index`: the current index
- `done([error])`: call this when you're done with an optional error. Supplying anything other than `undefined`/`null` will stop the iteration.

Note that order is not guaranteed since each item is handled concurrently.

#### finishedCallback(error)

Type: `Function`

Called when the iteration is finished or on the first error. First argument is the error passed from `done()` in the `callback`.


## License

MIT © [Sindre Sorhus](https://sindresorhus.com)