What is Koa Router and how do I use it?

What is Koa Router and how do I use it?

Koa Router is a routing library for Koa.js, designed to help you manage routes in your web applications.

Can you show me a basic example of how to set it up?

Sure! First, install it using npm: npm install koa-router. Then, you can create a simple router like this:

const Router = require('koa-router');
const router = new Router();

router.get('/', (ctx) => {
  ctx.body = 'Hello, Koa!';
});

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

How do I handle parameters in the routes?

You can handle parameters by defining them in the route path. For example:

router.get('/users/:id', (ctx) => {
  const userId = ctx.params.id;
  ctx.body = `User ID: ${userId}`;
});

What about middleware in Koa Router?

You can use middleware by adding it to your routes. For example:

router.get('/protected', yourMiddleware, (ctx) => {
  ctx.body = 'This is a protected route!';
});