1var router = require("express").Router()
2
3var varSetMiddleware = function(res,req,next){
4  router.variable = 100
5  // set the variable inside the router object 
6  // now you can access it anywhere in this specific router
7  next()
8}
9
10router.get("/first_view", function (req, res) {
11  // something  
12  console.log(router.variable) //100
13  res.send("something")
14})
15
16router.get('/second_view', function (req, res) {
17  // something
18  console.log(router.variable) //100
19  res.send("something")
20
21module.exports = router