Express |古典的な問題（TypeError：res.jsonは関数ではありません）

Express Classic Problem Typeerror

//login & register const express = require('express') const router = express.Router() router.get('/test',(res,req)=>{ res.json({msg:'asdakslj'}) }) module.exports = router

スワップ resとreq

//login & register const express = require('express') const router = express.Router() router.get('/test',(req,res)=>{ res.json({msg:'asdakslj'}) }) module.exports = router