πŸ•˜ Simple like Promise.all(), but sequentially!
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Latest commit fa1da97 Jul 26, 2017

README.md

promise-sequential

Simple like Promise.all(), but sequentially!

NPM version

Npm Downloads

Installation

npm install --save promise-sequential

Usage

const sequential = require('promise-sequential');

const items = [
  () => new Promise( ... )
  () => new Promise( ... )
  () => new Promise( ... )
];

sequential(items)
.then(res => {
  // ...
})
.catch(err => {
  // ...
})

There is only one difference between Promise.all usage and promise-sequential usage: promise-sequential receive an Array of functions that each returns a promise.

Each function brings three params:

Name Description
previousResponse The response of previous iteration
responses All responses received at the time
count The current count.

More complex usage

const sequential = require('promise-sequential');
const array = [1,2,3,4,5];

sequential(array.map((item) => {
  return function(previousResponse, responses, count) {

    return new Promise(resolve => {
      setTimeout(() => {
        resolve(item)
      }, 1000)
    })

  }
}))
.then(res => {
  // ...
})
.catch(err => {
  // ...
})