How would you pass something to a router?

Question

I've been working on an endpoint but I want it to work like bot/:id/vote

How would I get the ID to pass into that router so it goes like https://example.com/bot/512333785338216465/vote

Code

const vote = require("../routers/voting");
app.use("/bot/:id/vote", vote);

Answer 1

You need to use the mergeParams(default: false) option when creates a new router object.

Preserve the req.params values from the parent router. If the parent and the child have conflicting param names, the child’s value take precedence.

So the working code is:

const express = require('express');
const app = express();
const { Router } = express;

const vote = Router({ mergeParams: true });
vote.get('/', (req, res) => {
  console.log(req.params); //=> { id: '512333785338216465' }
  res.sendStatus(200);
});

app.use('/bot/:id/vote', vote);

app.listen(3000, () => console.log('Server started at http://localhost:3000'));

package version: "express": "^4.17.1",