⚡ JavaScript Essentials

Master the programming language that powers modern web development

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JavaScript Essentials Curriculum

12
JS Units
~80
Core Concepts
30+
Hands-on Projects
ES6+
Modern Features
1

JavaScript Introduction

Learn what JavaScript is and how to get started with programming.

  • What is JavaScript?
  • JavaScript history
  • Setting up environment
  • Browser console
  • Code editors
  • Including JS in HTML
  • First JavaScript program
  • Debugging basics
2

Variables and Data Types

Master variables, data types, and basic value manipulation.

  • Variable declarations
  • let, const, and var
  • Data types overview
  • Numbers and strings
  • Booleans and null
  • undefined values
  • Type conversion
  • Variable naming
3

Operators and Expressions

Work with operators to perform calculations and comparisons.

  • Arithmetic operators
  • Assignment operators
  • Comparison operators
  • Logical operators
  • Ternary operator
  • Operator precedence
  • String operations
  • Type coercion
4

Control Flow

Control program execution with conditionals and decision making.

  • if statements
  • else and else if
  • Switch statements
  • Truthy and falsy
  • Conditional expressions
  • Nested conditions
  • Short-circuit evaluation
  • Best practices
5

Loops and Iteration

Repeat code execution with various types of loops.

  • for loops
  • while loops
  • do-while loops
  • for...in loops
  • for...of loops
  • break and continue
  • Nested loops
  • Loop performance
6

Functions

Create reusable code blocks with functions and parameters.

  • Function declarations
  • Function expressions
  • Arrow functions
  • Parameters and arguments
  • Return statements
  • Function scope
  • Hoisting
  • Higher-order functions
7

Arrays

Store and manipulate collections of data with arrays.

  • Array creation
  • Array indexing
  • Array methods
  • Adding and removing elements
  • Array iteration
  • Multi-dimensional arrays
  • Array destructuring
  • Spread operator
8

Objects

Work with objects to represent complex data structures.

  • Object literals
  • Object properties
  • Object methods
  • this keyword
  • Object destructuring
  • Object constructors
  • Prototypes
  • Object manipulation
9

DOM Manipulation

Interact with web pages by manipulating the Document Object Model.

  • Understanding the DOM
  • Selecting elements
  • Modifying content
  • Changing styles
  • Adding/removing elements
  • Event handling
  • Form manipulation
  • DOM traversal
10

Events and Interactivity

Create interactive web pages by handling user events.

  • Event types
  • Event listeners
  • Event objects
  • Event propagation
  • Event delegation
  • Mouse events
  • Keyboard events
  • Form events
11

Asynchronous JavaScript

Handle asynchronous operations with callbacks, promises, and async/await.

  • Synchronous vs asynchronous
  • Callbacks
  • Promises
  • async/await
  • Fetch API
  • Error handling
  • Timeout functions
  • Event loop
12

ES6+ Modern Features

Master modern JavaScript features and best practices.

  • Template literals
  • Destructuring assignment
  • Modules import/export
  • Classes
  • Map and Set
  • Symbol data type
  • Iterators and generators
  • Optional chaining

Unit 1: JavaScript Introduction

Learn what JavaScript is and how to get started with programming.

What is JavaScript?

Understand the role and capabilities of JavaScript in web development.

Programming Language Client-Side Server-Side Dynamic
JavaScript is a versatile programming language that runs in web browsers and on servers. It's the language that makes web pages interactive and dynamic, allowing you to respond to user actions and create engaging experiences.
// JavaScript can do many things:
console.log("Hello, World!"); // Output to console
alert("Welcome!"); // Show popup

// Change webpage content
document.body.innerHTML = "<h1>JavaScript Works!</h1>";

// Perform calculations
let result = 10 + 5 * 2; // Mathematical operations
console.log(result); // Outputs: 20
Click me to see JavaScript in action!

Setting Up Environment

Prepare your development environment for JavaScript programming.

Development Tools:
• Web Browser: Chrome, Firefox, Safari, or Edge
• Text Editor: VS Code, Sublime Text, or Atom
• Browser DevTools: For debugging and testing
• Online Editors: CodePen, JSFiddle for quick testing
Getting Started:
You don't need to install anything special to start with JavaScript. Every modern web browser has a JavaScript engine built-in, and you can start coding immediately using the browser's console.

Including JS in HTML

Learn different ways to add JavaScript to your web pages.

Three Methods:
• Inline: JavaScript directly in HTML attributes
• Internal: JavaScript in <script> tags
• External: JavaScript in separate .js files
<!-- Inline JavaScript -->
<button onclick="alert('Clicked!')">Click Me</button>

<!-- Internal JavaScript -->
<script>
  function greetUser() {
    console.log("Hello from internal script!");
  }
</script>

<!-- External JavaScript -->
<script src="script.js"></script>
Best Practice: Use external JavaScript files for better organization, caching, and maintainability. Avoid inline JavaScript except for very simple interactions.

Unit 2: Variables and Data Types

Master variables, data types, and basic value manipulation.

Variable Declarations

Learn how to create variables to store data in JavaScript.

let const var scope
Variables are containers that store data values. JavaScript has three ways to declare variables: var (old style), let (block-scoped), and const (constant values).
// Modern variable declarations
let userName = "Alice"; // Can be changed
const birthYear = 1990; // Cannot be changed
var oldStyle = "deprecated"; // Avoid using

// Variable reassignment
userName = "Bob"; // ✅ Allowed with let
// birthYear = 1991; // ❌ Error with const

console.log(userName); // Outputs: Bob
console.log(birthYear); // Outputs: 1990
Variable Example:
let message = "Hello, JavaScript!";
console