use class will mack an exception

[EzrealPrince]

node version: v10.14.0 express my router.js: const a = require('../api/test.js'); router.get('/', (req, res, next) => new a(req, res, next).main() ); my test.js module.change_code = 1; class test { constructor(req, res, next) { this.req = req; this.res = res; // super(req, res, next); } main() { const b = { a: 1, b: 2 } this.res.render('index', { title: 'Express11' , ...b}) } } module.exports = test;