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Showing content from https://www.npmjs.com/package/koa-dec-router below:

koa-dec-router - npm

• An ES6 decorator + class based router, support inherit, override, priority, auto load controllers, etc.
• Using koa-router under the hood.
• Examples

or

yarn add koa-dec-router

app.js

 
import Koa from 'koa'
import DecRouter from 'koa-dec-router'
 
const decRouter = DecRouter({
  controllersDir: `${__dirname}/controllers`,
  before: null, 
  after: null, 
})
 
const app = new Koa()
 
app.use(decRouter.router.routes())
app.use(decRouter.router.allowedMethods())
 

controllers/api.js

import { controller, get, post } from 'dec-router'
 
async function apiHandler(ctx, next) {
  console.log('handle all api and subclass\'s')
  await next()
}
 
@controller('/api', apiHandler)
export default class Api {
  async getApiCommon(ctx) {
    
    return 
  }
}
 

controllers/posts.js

 
import { controller, get, post } from 'dec-router'
import Api from './api'
 
async function postHandler(ctx, next) {
  console.log('handle post')
  await next()
}
 
@controller('/subpost')
export class Subpost {
  @get('s')
  async list(ctx) {
    ctx.body = 'get subpost'
  }
 
}
 
@controller('/post')
export default class Post extends Api {
 
  @get('s') 
  async list(ctx) {
    const commonData = await super.getApiCommon()
    ctx.body = 'get posts'
  }
 
  @get('/:id', {priority: -1}) 
  async get(ctx) {
    ctx.body = 'get' + ctx.params.id
  }
 
  @get('/special')
  async special(ctx) {
    ctx.body = 'special post'
  }
}
 

To output all routes generated by dec-router, you can run your app like

DEBUG=dec-router,your-app:* node ./your-app.js

For windows, using cross-env

cross-env DEBUG=dec-router,your-app:* node ./your-app.js

See more about DEBUG

• options: {object}
  • controllersDir: {string} controllers directory
  • before: {function} optional, first middleware for all controller methods
  • after: {function} optional, last middleware for all controller methods (before controller method)
  • autoLoadControllers: {bool} optional, default is true

Controller decorator.

• path: {string} optional, path of this controller, default is '/' + slug(cls.name), can be inherited
• opts: {object} optional, options, cannot be inherited
  • ignoreParentPath: {bool} optional, default is false
  • ignoreParentMdws: {bool} optional, default is false
  • expose: {bool} optional, expose as a route default is false
• middlewares: {Array} optional, koa middlewares, can be inherited

Controller method decorator, default would totally override superclass's method with same path (not same name), including method, opts, middlewares, etc.

• method: {string}, one of 'get', 'head', 'post', 'put', 'delete', 'patch', 'use';
• path: {string} optional, path of this method, default is '/' + slug(method.name)
• opts: {object} optional, options
  • priority: {number} optional, larger before smaller, default is 0
  • ignoreCtrlPath: {bool} optional, ignore all controller path, including superclass's, default is false
• middlewares: {Array} optional, koa middlewares

alias of @route('get', path, opts, ...middlewares)

alias of @route('head', path, opts, ...middlewares)

alias of @route('post', path, opts, ...middlewares)

alias of @route('put', path, opts, ...middlewares)

alias of @route('delete', path, opts, ...middlewares)

alias of @route('patch', path, opts, ...middlewares)

alias of @route('use', path, opts, ...middlewares)

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