koa-compose
Advanced tools
Package description
The koa-compose package is a middleware composition utility for Koa, a web framework for Node.js. It allows developers to combine multiple middleware functions into a single middleware without altering their signature. This is particularly useful for creating complex sequences of asynchronous operations that can be executed in a defined order.
Middleware Composition
This feature allows the combination of multiple middleware functions into a single middleware chain. The code sample demonstrates how to compose two middleware functions and apply them to a Koa application.
const Koa = require('koa');
const compose = require('koa-compose');
const app = new Koa();
async function randomMiddleware(ctx, next) {
// perform some operations
await next();
}
async function anotherMiddleware(ctx, next) {
// perform other operations
await next();
}
const allMiddlewares = compose([randomMiddleware, anotherMiddleware]);
app.use(allMiddlewares);
app.listen(3000);Connect is an extensible HTTP server framework for node using 'plugins' known as middleware. It is similar to koa-compose in the sense that it allows the use of middleware in a sequence. However, Connect is more of a server framework itself, whereas koa-compose is specifically designed for use with Koa.
Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications. It has built-in middleware composition, similar to what koa-compose offers, but it is part of a larger framework rather than a standalone middleware utility.
middleware-compose is a package that allows for the composition of middleware functions in a manner similar to koa-compose. It is designed to work with any middleware-based system, not just Koa, making it more versatile in terms of compatibility with different frameworks.
Redux is a state management library for JavaScript apps, and it features a 'compose' function that is conceptually similar to koa-compose. It allows for the composition of functions, particularly middleware in the context of Redux, to enhance store functionality. While it serves a different purpose (state management vs. HTTP middleware), the composition concept is a shared feature.
Readme
Compose middleware.
$ npm install koa-compose
Compose the given middleware and return middleware.
MIT
FAQs
compose Koa middleware
The npm package koa-compose receives a total of 1,438,327 weekly downloads. As such, koa-compose popularity was classified as popular.
We found that koa-compose demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 10 open source maintainers collaborating on the project.
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