Brtest Tutorial
Frontend vs Backend
When you visit a website, there are two main parts working together:
- Frontend – What you see and interact with in your browser.
- Backend – What happens behind the scenes on the server.
Understanding the difference between the frontend and backend helps you see how web developers work together to create complete websites.
Tip: You don’t need to learn backend right away — start with frontend development (HTML, CSS, and JavaScript). That’s what this tutorial focuses on first.
The Frontend (Client Side)
The frontend is everything that happens in the web browser. It’s the part users can see and interact with: text, images, buttons, forms, menus, and animations.
Frontend developers use:
HTMLto create the page structureCSSto style and design the layoutJavaScriptto add interactivity
Example
Here is a simple frontend login form (no backend yet):
<h2>Login Form</h2>
<form>
<label>Username:</label>
<input type="text"><br><br>
<label>Password:</label>
<input type="password"><br><br>
<button>Login</button>
</form>
Try it Yourself »
Note: This example only shows the frontend. The button doesn’t actually log you in because there’s no backend logic yet.
The Backend (Server Side)
The backend is where the website’s data and logic live. It runs on a web server and handles tasks like:
- Storing and retrieving data (like usernames, passwords, posts, or products)
- Handling user authentication and permissions
- Processing forms and sending responses back to the frontend
Backend developers use server-side languages like:
- Python (with frameworks like Django or Flask)
- PHP (used in WordPress)
- Node.js (JavaScript on the server)
- Java or C# (for large-scale applications)
Example
This diagram shows how frontend and backend communicate:
Browser (Frontend) → sends a form request → Server (Backend)
Server → checks the data → sends a response (HTML or JSON)
Browser → updates the page with the result
How They Work Together
When you log in to a website or post a comment:
- The frontend displays the form and collects user input.
- The backend checks the input and saves it to a database.
- The frontend then shows a success message or error based on the backend response.
Example
A very simplified frontend + backend flow:
Frontend → "Submit login info"
Backend → "Checking credentials..."
Backend → "Login successful!"
Frontend → Displays "Welcome back!"
Analogy: The frontend is the restaurant menu. The backend is the kitchen that prepares your food.
Full-Stack Development
A Full-Stack Developer understands both frontend and backend development — how to design what users see and how to make it work behind the scenes.
In this tutorial, you’ll first become comfortable with the frontend:
- HTML (Structure)
- CSS (Style)
- JavaScript (Behavior)
Later, you can explore backend technologies (like databases, servers, and APIs) to become a full-stack web developer.
Summary
- Frontend: Everything you see and interact with (HTML, CSS, JS)
- Backend: The behind-the-scenes code that stores and manages data
- Both parts work together to create a complete website
Next, you will learn what tools you need to start coding — your web browser, code editor, and how to set up your first project folder.
