sequencing

Sequencing
==========

Sequencing is a generic middleware pattern for sequential operations.

$3

``bash
npm i sequencing
`

$3

`js
const createSeq = require('sequencing')

const seq = createSeq()

// set up middleware logic

seq.use((context, next) => {
console.log(context) // {name: 'Julie'}
next(null, { name: 'Jacob' }) // can change the context of the next middleware
})

seq.use((context, next) => {
console.log(context) // {name: 'Jacob'}
next(new Error('uh oh'), context) // set error
})

seq.useOnError((err, context) => {
console.log(err) // [Error: uh oh]
console.log(context) // {name: 'Jacob'}
})

// trigger an event for middleware to process

seq.fire({ name: 'Julie' })
``