https://github.com/goto-bus-stop/p-join

combine results from multiple promises into a single value
https://github.com/goto-bus-stop/p-join

promise

Last synced: about 2 months ago
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combine results from multiple promises into a single value

• Host: GitHub
• URL: https://github.com/goto-bus-stop/p-join
• Owner: goto-bus-stop
• License: mit
• Created: 2017-06-11T11:21:34.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2021-05-01T11:04:30.000Z (over 3 years ago)
• Last Synced: 2024-11-01T15:38:35.497Z (2 months ago)
• Topics: promise
• Language: JavaScript
• Homepage:
• Size: 20.5 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md
  • License: LICENSE

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README

        
# p-join

Combine results from multiple promises into a single value.

Like [Promise.join](http://bluebirdjs.com/docs/api/promise.join.html) from bluebird.

## Installation

With npm:

```bash

npm install --save p-join

```

## Usage

```js

var join = require('p-join')

var result = join(

  Promise.resolve(10),

  Promise.resolve(20),

  function (a, b) { return a + b }

)

result.then(function (sum) {

  assert.equal(sum, 30)

})

```

Compare doing this with `Promise.all`:

```js

var result = Promise.all([

  Promise.resolve(10),

  Promise.resolve(20)

]).then(function (results) { return results[0] + results[1] })

result.then(function (sum) {

  assert.equal(sum, 30)

})

```

## API

### result = require('p-join')(...promises, callback)

Pass Promises or values as separate arguments.

The `callback` receives the resolved values of all `...promises` as arguments, in order.

If `callback` returns a value or a Promise, `result` will resolve with that value.

## License

[MIT](./LICENSE)