Node Js, Require is not defined in global folder-CodePudding

I have a node.js server to create a web chat application. But I have a problem. In one file, I want to get a function from another file with the require method and module.export. In my first file (server.js, which is in the root path), the require method works, but in the /js folder (which is not in the root), it does not work. I installed npm and all packages globally.

My All File :

Code in chat.js:

const {verifUserConnected, getUserInfo} = require('express');
console.log(verifUserConnected)

Code in connect.js :


function verifUserConnected(){
    return isConnected;
}

function getUserInfo(){
    return null;
}


module.exports = {
    verifUserConnected,
    getUserInfo
};

In "Server.js" The require method works

CodePudding user response：

You've put connect.js in underneath a folder named "public" which implies you are serving it to the browser and trying to run it client-side.

Browsers do not have native support for CommonJS modules (i.e. module.exports and require).

Your starting options are:

Rewrite the client-side code to not use modules
Rewrite the client-side code to use JavaScript modules (i.e. using import, export and <script type="module").
Transpile the modules for use on the browser (e.g. using a tool like Webpack or Parcel.js

However … chat.js attempts to require('express'). Express will not run in the browser and doesn't export anything named verifUserConnected either. You'll need to address that too.

CodePudding user response：

In Common JS (Node JS works by default eith Common JS)

const startServer = () => {
// Code
};

module.exports = { startServer }
//Or
exports.startServer = startServer;

To import.

const { startServer } = require("./path");

If you have any question ask me