Package Exports

promise-sequential

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (promise-sequential) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

promise-sequential

Simple like Promise.all(), but sequentially!

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 => {
  // ...
})