when i use koa-compose with koa-router, koa-router does not work.

app.js

const Koa = require('koa');
const app = new Koa();
const views = require('koa-views')(__dirname + '/views', {
    extension: 'pug'
});
const json = require('koa-json');
const onerror = require('koa-onerror');
const bodyparser = require('koa-bodyparser')({
    enableTypes:['json', 'form', 'text']
});
const logger = require('koa-logger');
const koa_static = require('koa-static')(__dirname + '/public')
const compose = require('koa-compose');

const index = require('./routes/index');
const users = require('./routes/users');

// error handler
onerror(app);

// composed middleware
const all = compose([
    bodyparser,
    json,
    logger,
    koa_static,
    views
]);

// routes
app.use(all);

// routes
app.use(index.routes(), index.allowedMethods());
app.use(users.routes(), users.allowedMethods());

module.exports = app;

[fl0w]

Well, looking at this more, you need to instantiate koa-json e.g.

const json = require('koa-json')()

You’re passing in constructors which are not middleware that Koa understands.

The following minimal works as expected,

'use strict'

const Koa = require('koa')
const Router = require('koa-router')
const compose = require('koa-compose')
const json = require('koa-json')
const logger = require('koa-logger')

const app = new Koa()
const router = new Router()
// Correctly return a Koa middleware for all mw
const middleware = compose([json(), logger()])

router.get('/', async ctx => {
  ctx.body = 'It should work'
})

app.use(middleware)
app.use(router.routes())
app.use(router.allowedMethods())

app.listen(1337)

[trevorhreed]

Why does…

app.use(compose([
  router.routes(),
  router.allowedMethods()
]))

…not work?