javascript - Exporting routes in Koa

Question

I'm having a strange issue when exporting my routes. For some reason, this code works for me:

app.js

import Koa from 'koa'
import routes from './routes/index'

const app = new Koa()

app.use(routes)

app.listen(3000, () => {
  console.log('Server listening at http://localhost:3000')
})

export default app

routes/index.js

import Router from 'koa-router'
const router = new Router()

router.get('/', async ctx => {
  await ctx.render('index')
})

export default router.routes()

---

but when I just export the routes function and then try to call it in app.js, I get an error:

app.js

import Koa from 'koa'
import routes from './routes/index'

const app = new Koa()

app.use(routes())

app.listen(3000, () => {
  console.log('Server listening at http://localhost:3000')
})

export default app

routes/index.js

import Router from 'koa-router'
const router = new Router()

router.get('/', async ctx => {
  await ctx.render('index')
})

export default router.routes

Why doesn't it work when I do it the second way?

Answer 1

你可能想导出一个绑定函数，所以this它里面会引用一个路由器对象。

使用绑定运算符可以很好地完成它。我相信它已经可用，因为您正在使用async/await.

import Router from 'koa-router'
const router = new Router()

router.get('/', async ctx => {
  await ctx.render('index')
})

export default ::router.routes

Answer 2

您必须添加一个方法：

router.allowedMethods()

像这样：

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