Transform ES2015 Promise to Stream - specifically, Transform Stream using through2. Works in object mode by default, but you can pass options directly to the through2 package.

npm i promise2stream --save

For more use-cases see the tests

const promise2stream = require('promise2stream')

Transform a Promise val to transform stream.

Params

• val {Promise}: Some promise.
• opts {Object}: Options passed directly to through2.
• returns {Stream}

Example

var promise2stream = require('promise2stream')
var promise = Promise.resolve(123)

var stream = promise2stream(promise)
stream
  .on('data', function (val) {
    console.log(val) // => 123
  })
  .once('error', console.error)
  .once('end', function () {
    console.log('end')
  })

// or access the promise
stream.promise.then(function (val) {
  console.log(val) // => 123
}, console.error)

// rejected promise fires `error` event
var rejectedPromise = Promise.reject(new Error('foo err'))
var stream = promise2stream(rejectedPromise)

stream.once('error', function (err) {
  console.log(err) // => [Error: foo err]
})

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Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
But before doing anything, please read the CONTRIBUTING.md guidelines.