promise-sequential

Simple like Promise.all(), but sequentially!



Installation

``
npm install --save promise-sequential
`


Usage

`js
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. |

$3

`js

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 => {
// ...
})
``