How to build a server in nodejs

Steps to build a Node.js server: Preparation: Install the Node.js environment, text editor and terminal tools. Initialize the project: Create the project folder and use npm to initialize the project. Install the Express framework: Use npm to install Express. Create the server file: Create the server.js file as the server file. Write server code: Write Express code in server.js. Run the server: Use the node server.js command to start the server. Access the server: Visit http://localhost:3000 in the browser.

nodejsHow to build a server

1. Preparation

Before building a nodejs server, you need to prepare the following:

1. nodejs environment
2. Text editor (such as Visual Studio Code)
3. Terminal tool

2. Construction steps

1. Create project folder

   Create a folder for storage Server code.

2. Initialize the project

   In the project folder, use npm (nodejs package manager) to initialize a project, the command is as follows:

   <code>npm init -y</code>

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3. Install Express Framework

   Express is a nodejs framework for building web applications. Install it using npm with the following command:

   <code>npm install --save express</code>

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4. Create server file

   In the project folder, create a new file like server.js, as a server file.

5. Write server code

   In the server.js file, write the following code:

   <code>const express = require("express");
   const app = express();
   
   app.get("/", (req, res) => {
     res.send("Hello world!");
   });
   
   app.listen(3000, () => {
     console.log("Server listening on port 3000");
   });</code>

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6. Run the server

   In the terminal, switch to the project folder and run the following command to start the server:

   <code>node server.js</code>

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3. Access the server

After the server is started, you can view the server response by accessing http://localhost:3000 in the browser.

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