Koa development notes

DEMO-01

1. Install koA and KoA-Router

yarn add koa
yarn add koa-router
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2. Introduce koA and KoA-Router

const koa = require('koa')
const router = require('koa-router')
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3. Configure routes

router.get('/'.(ctx,err) = >{
    ctx.body = '<h1>Hello</h1>'
})

// Configure the route
app.use(router.routes()).use(router.allowedMethods())
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4. Listen to the port

const port = process.env.PORT || 8005

app.listen(port,_= >{
    console.log('Listen to open port 8005')})Copy the code

5. Complete the demo

const Koa = require('koa')
const Router = require('koa-router')

// instantiate koA
const app = new Koa()
const router = new Router()

router.get('/'.(ctx,err) = >{
    ctx.body = '<h1>Hello</h1>'
})

// Configure the route
app.use(router.routes()).use(router.allowedMethods())

const port = process.env.PORT || 8005

app.listen(port,_= >{
    console.log('Listen to open port 8005')})Copy the code