Why Am I Getting 502 Error After Adding Require In Express JS File?

I am trying to require a js file in my express api but I am getting a 502 error whenever I do. The file getJSON.js is in the same directory as my express js file but for some reason I am having trouble accessing it:

docapi.js:
const http = require('http');
const getJSON = require('getJSON.js'):
const hostname = 'localhost';
const port = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World!\n');
})

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

Here is the file I am trying to require:

getJSON.js:
test() {
  console.log("Hello again.")
}

Sorry for such an easy question, but I haven’t found an explanation anywhere else. Can anyone tell me what I am doing wrong, please?

>Solution :

Have you looked at the console for your server process? It’s probably spewing out errors.

• You need a semicolon (;), not a colon (:) after require()
• Then, you’d get "can’t resolve getJSON.js" since what using an absolute path in require would refer to a module in node_modules. Instead, if docapi.js and getJSON.js are in the same directory, you’ll want

  const getJSON = require('./getJSON.js');
  

• Thirdly, the syntax in getJSON.js is invalid: You’ll want e.g.

  function test() {
     console.log("Hello again.")
  }
  

• And to be able to call that function from the other file, you’ll need to export it:

  module.exports = function test() {
     console.log("Hello again.")
  }
  

• After which you could do

  const getJSON = require('./getJSON.js');
  getJSON();
  

  in the other file.