NodeJS http request event listener firing more than once-CodePudding

I'm new to backend development so have just made my first server using NodeJS and the http module. This is my code so far:

const http = require("http");
let count = 0;
const server = http.createServer((req, res) => {
  res.write(count.toString());
  //tells the server that all of the headers and body have been sent, so the message is complete
  res.end();
  count  = 1;
});

server.listen(3000);

I understand how almost all of this code works. However, whenever I refresh the page on my local environment (send a new request) I would expect the displayed response to increment by 1, however, it increments by 2. The only reason I can think this would happen is that the request event listener is being fired twice on each page reload, however, I cannot find anything to help me with this issue so any help would greatly be appreciated.

CodePudding user response：

If i understand what this website says

Maybe there are multiple requests sent to your server on page reload. I hope this helped, otherwise, you can try to log in your requestListener the req object to know what triggers it, and where does it come from.