# compose-middleware

> Compose an array of middleware into a single function for use in Express, Connect, router, etc.

Latest version **5.0.1** (published 2018-12-03) · MIT license · 118.8K weekly downloads

## Install

```sh
npm install compose-middleware
pnpm add compose-middleware
yarn add compose-middleware
bun add compose-middleware
```

## Health

**Score 40/100 (D)** — status: abandoned.

Positive: moderate downloads; has types; no vulnerabilities; high quality score.

Warnings: no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 5.0.1 |
| Published | 2018-12-03 |
| First published | 2015-08-05 |
| Weekly downloads | 118.8K |
| License | MIT |
| TypeScript types | bundled |
| Module format | CommonJS |
| Dependencies | 3 |
| Unpacked size | 31.8 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 90 |
| Author | Blake Embrey |
| Maintainers | blakeembrey |
| Keywords | middleware, express, compose, flatten, function |

## Links

- npm: https://www.npmjs.com/package/compose-middleware
- Repository: https://github.com/blakeembrey/compose-middleware
- Issues: https://github.com/blakeembrey/compose-middleware/issues
- npm.io page: https://npm.io/package/compose-middleware

## Dependencies (3)

- [debug](https://npm.io/package/debug.md) ^4.1.0
- [@types/debug](https://npm.io/package/@types/debug.md) 0.0.31
- [array-flatten](https://npm.io/package/array-flatten.md) ^2.1.2

## Alternatives

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## Recent versions

- 5.0.1 (latest) — 2018-12-03
- 5.0.0 — 2018-05-15
- 4.0.0 — 2017-12-23
- 3.0.0 — 2017-08-02
- 2.2.0 — 2016-06-28
- 2.1.0 — 2016-04-29
- 2.0.1 — 2015-08-24
- 2.0.0 — 2015-08-24
- 1.0.2 — 2015-08-05
- 1.0.1 — 2015-08-05
- 1.0.0 — 2015-08-05

## README

# Compose Middleware

[![NPM version][npm-image]][npm-url]
[![NPM downloads][downloads-image]][downloads-url]
[![Build status][travis-image]][travis-url]
[![Test coverage][coveralls-image]][coveralls-url]

> Compose an array of middleware into a single function for use in Express, Connect, router, etc.

## Installation

```sh
npm install compose-middleware --save
```

## Usage

Compose multiple middleware functions into a single request middleware handler, with support for inline error handling middleware.

```js
var express = require('express')
var compose = require('compose-middleware').compose

var app = express()

app.use(compose([
  function (req, res, next) {},
  function (err, req, res, next) {},
  function (req, res, next) {}
]))
```

**P.S.** The composed function takes three arguments. Express.js (and Connect, router) only accept error handlers of four arguments. If you want to return an error handler from `compose` instead, try the `errors` export - it works exactly the same, but exposes the four argument middleware pattern.

## License

MIT

[npm-image]: https://img.shields.io/npm/v/compose-middleware.svg?style=flat
[npm-url]: https://npmjs.org/package/compose-middleware
[downloads-image]: https://img.shields.io/npm/dm/compose-middleware.svg?style=flat
[downloads-url]: https://npmjs.org/package/compose-middleware
[travis-image]: https://img.shields.io/travis/blakeembrey/compose-middleware.svg?style=flat
[travis-url]: https://travis-ci.org/blakeembrey/compose-middleware
[coveralls-image]: https://img.shields.io/coveralls/blakeembrey/compose-middleware.svg?style=flat
[coveralls-url]: https://coveralls.io/r/blakeembrey/compose-middleware?branch=master

---
_Source: https://npm.io/package/compose-middleware · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._