获取错误 res.setHeader 不是 Function

Question

I am trying to create a nodejs server. I used res.setHeader method to set content-type as text/html. But after starting the server getting error that res.setHeader is not a function; Following is my code:

 const http=require('http'); const server=http.createServer((res,req)=>{ res.setHeader('Content-Type','text/html') res.write('<h1>Hello This is response from NodeJS>Server</h1>') res.end() }) server.listen(8000);

I have attached image that clearly shows that this is not a function

Answer 1

res is the second argument, not the first argument.

const server=http.createServer((req, res)=>{
...

Here is the doc: https://expressjs.com/en/guide/routing.html