1. What is Web Development? 🌐

Web Development ay ang proseso ng paglikha at pagpapanatili ng mga website at web applications. Binubuo ito ng frontend (kung ano ang nakikita ng users) at backend (ang nagtatrabaho behind the scenes).

Frontend Development

Ang nakikita ng user - HTML, CSS, JavaScript, React, Vue, Angular.

Backend Development

Behind the scenes - Node.js, Python, Java, databases, APIs.

2. Frontend Technologies 🎨

Technology	Purpose	Example
HTML	Structure - tags para sa content	<h1>, <p>, <div>
CSS	Styling - colors, fonts, layout	Flexbox, Grid, Responsive Design
JavaScript	Interactivity - user actions	Button clicks, form validation
React/Vue	Frameworks - complex UIs	Single Page Applications (SPA)

3. HTML: The Foundation 🏗️

HTML Structure

<!DOCTYPE html>
<html>
  <head>
    <title>Page Title</title>
  </head>
  <body>
    <h1>Heading</h1>
    <p>Paragraph</p>
    <a href="link">Link</a>
  </body>
</html>

Common HTML Tags

<h1> to <h6> - Headings
<p> - Paragraphs
<div> - Container
<form> - Form inputs

Semantic HTML5

<header> - Page header
<nav> - Navigation
<article> - Content
<footer> - Page footer

4. CSS: Styling 🎨

CSS Syntax

selector {
  property: value;
  property: value;
}

/* Example */
h1 {
  color: blue;
  font-size: 32px;
  text-align: center;
}

CSS Concept	Purpose	Example
Selectors	Target HTML elements	.class, #id, element
Box Model	Margin, border, padding	margin: 10px; padding: 5px;
Flexbox	Flexible layouts	display: flex;
Grid	2D grid layouts	display: grid;

5. JavaScript: Making it Interactive 🧠

JavaScript Basics

// Variables
let name = "Techie";
const age = 25;

// Functions
function greet(name) {
  return "Hello, " + name;
}

// DOM manipulation
document.getElementById("btn").addEventListener("click", () => {
  alert("Button clicked!");
});

Core Concepts

Variables & Data Types
Functions & Callbacks
DOM Manipulation
Event Listeners
Promises & Async/Await

Common Uses

Form validation
Responsive menus
API calls
Real-time updates
Game development

6. Modern Frameworks & Tools 🛠️

Framework/Tool	Purpose	Best For
React	Component-based UI library	Single Page Apps (SPAs)
Vue.js	Progressive framework	Flexible, beginner-friendly
Node.js	JavaScript runtime	Backend development
npm/Webpack	Package & module bundlers	Dependency management

7. Web Development Workflow 🔄

Typical Development Process

Planning: Sketch wireframes, plan features
Frontend: HTML structure, CSS styling, JavaScript logic
Backend: Databases, APIs, server logic
Testing: Unit tests, integration tests, user testing
Deployment: Push to servers (Vercel, Netlify, AWS)
Maintenance: Bug fixes, updates, monitoring

8. Best Practices 💡

Frontend Best Practices

Responsive design (mobile-first)
Semantic HTML
Clean, DRY CSS
Performance optimization
Accessibility (a11y)

Backend Best Practices

RESTful API design
Security (authentication)
Database optimization
Error handling
Code documentation

9. Practice Questions 📚

Common Exam & Interview Questions

Q1: What's the difference between frontend and backend development?

A: Frontend = what users see (HTML/CSS/JS), Backend = server-side logic, databases, APIs

Q2: Explain the CSS Box Model.

A: Content → Padding → Border → Margin. These create spacing around elements.

Q3: What is a single-page application (SPA)?

A: A web app that loads once and dynamically updates content without full page reloads (React, Vue).

Q4: How do you make a website responsive?

A: Use media queries, flexbox/grid, mobile-first design, and relative units (%, rem).

Q5: What's the purpose of npm?

A: Node Package Manager - manages dependencies, scripts, and packages for JavaScript projects.

Q6: Explain async/await in JavaScript.

A: Async/await simplifies promise handling - async declares function returns promise, await pauses until resolved.

🔥 Techie Challenge 🔥

Build a simple website: Create an HTML page with CSS styling at responsive layout, add JavaScript na mag-handle ng user interactions.

Code mode activated! Compile your knowledge sa practice questions.

Web Development