Async concurrent iterator (async forEach)
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each-async Build Status

Async concurrent iterator (async forEach)

Like async.each(), 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.

I would strongly recommend using promises instead. You could then use the built-in Promise.all(), or p-map if you need concurrency control.


$ npm install --save each-async


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

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


eachAsync(input, callback, [finishedCallback])


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.


Type: Function

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


MIT © Sindre Sorhus