koa2入门学习(2)-路由GET请求

1.安装依赖  npm i koa-router 

2.修改app.js:

const Koa  = require('koa')
const router = require('koa-router')()   // 这里要注意,返回的是函数
const app = new Koa()

app.use(async(ctx,next) => {
    await next()
})


router.get('/hello/:name', async (ctx,next) => {
    var name = ctx.params.name
    ctx.response.body = `<h3> hello ${name}</h3>`
})

router.get('/', async (ctx,next) => {
    ctx.response.body = `<h3> index <h3>`
})

app.use(router.routes())

app.listen(3000)

console.log('app started at port 3000...')

3.效果如下: