WEBVTT

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Introduction to Backend Basics

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In this video, you will understand the role of servers, databases, and applications.

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Identify Node and Express JavaScript as Core Backend Technologies.

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Create and run a simple Express JavaScript Server.

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What is the Backend?

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The back end of a web application is the server side system.

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It processes requests, manages data, and connects the user interface with stored information.

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Unlike the front end, which focuses on design and user interaction,

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the back end performs logical operations that make the application work.

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A typical back end system includes three key components, server, receives and processes requests,

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database, stores, and organizes information.

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Application links the server and database.

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Backend tools

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Modern back end development often uses Node.js and Express.js.

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Node.js runs JavaScript code on the server.

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Express.js is a framework that helps organize the server and manage routes.

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Together, they allow developers to build scalable, efficient, and reliable web applications.

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Creating a simple server

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Now, let's learn how to set up a basic back end server using Node.js and Express.js.

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First, open command prompt and go to the folder where you want to build your project.

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Type, CDC colon users, ADMIN documents back end basics.

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Next, initialize a Node.js project by typing, NPM, init, dash, or y.

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This creates a package file that manages project settings.

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Now install Express. The framework will use to build our server.

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Type, NPM install Express.

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Open NotePad and create a new file called app.js.

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Inside, write the following code.

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This code sets up a server and creates one route that sends a message back to the browser.

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Back in command prompt type, nodeapp.js.

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If everything works, you will see.

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Server running at HTTP colon slash slash localhost colon 3000.

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Finally, open your browser and go to HTTP Arts.de localhost colon 3000.

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You should see the message. Welcome to our Express server, allowable web applications.

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The backend is the foundation of web applications, handling requests, and managing data.

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With Node.js and Express.js, developers can set up servers that respond to users, forming the first step in dynamic web development.