为什么从本地文件中要求猫鼬不起作用？

Question

So I have the code

Directory/app/script.js:-

// MongoDb
// Connect to MongoDB through Mongoose
const mongoose = require('mongoose')
mongoose.connect('mongodb://localhost:27012/profiles')

// Requiring the Schemas
const SignIn = require('MongoDb/Models/profiles.js')

console.log(SignIn)

So what is wrong in the code. The console in the web says that require is not defined. Can you help me with how to go about it.

Answer 1

There are two reasons you might get this error. Since you said

The console in the web says

I expect it is the first reason in your code

You are running the code in a web browser

Node.js is a stand-alone environment for running JavaScript. It is not a browser extension.

To run Node.js code, save it in a file with a .js file extension, then run it with:

node yourFile.js

If you want Node.js code and browser code to interact then the typical way is to write a server in Node.js that hosts a web service. Express.js is a popular way to do this. You can then use Ajax to make HTTP requests to that web service.

For bi-directional communication (as opposed to the request/response of Ajax) look at Socket.io.

You are using ECMAScript modules

Node originally used CommonJS modules which use module.exports and require .

Recent versions also support ECMAScript modules which use export and import .

Either switch to using import instead of require or change your configuration to use CommonJS modules.