@f/middleware v1.1.0

middleware

Utility for middleware composition.

Installation

$ npm install @f/middleware

Usage

var middleware = require('@f/middleware')
var pipe = require('ramda').pipe

var powAdd = middleware(composePipe)
  .use(Math.pow)
  .use(function (arg) {
    return arg + 1
  })

powAdd(2, 4) // => 17

var powAddMultiply = powAdd.add(function (arg) {
  return arg * 2
})

powAddMultiply(2, 4) // => 34

function composePipe(stack) {
  return pipe.apply(null, stack)
}

API

middleware(compose, stack)

• compose - compose function with signature compose(stack)
• stack - array of middleware

Returns: A function representing the composition of the stack. The composed function additionally has helper properties for manipulating the stack.

• .use(fn): adds fn to stack
• .add(fn): immutably add fn to stack
• .copy(fn): make copy of stack return new composed function
• .map(fn): map stack over fn and return new composed function

License

MIT