Welcome to JD Academy - Unleashing the Power of Front-End Magic!

Welcome to the HTML section of JD Academy! In this module, you'll embark on a journey to master the fundamental language of the web—HTML. As the backbone of every web page, HTML allows you to structure content and create a seamless browsing experience for users.

JavaScript( JS ):

History:

Evaluation:

Advantages:

Challenges:

Chapter 1: Introduction to JavaScript

Section 1.1: What is JavaScript?

Definition:

JavaScript is a versatile, high-level programming language primarily used for building dynamic and interactive web pages. It allows developers to manipulate the content, structure, and behavior of a webpage.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<h1>Hello, JavaScript!</h1>
<script>
// Internal JavaScript code
console.log("Hello, JavaScript!");
</script>
</body>
</html>

Section 1.2: Variables and Data Types

Variables:

Variables are containers for storing data. In JavaScript, you can use 'var', 'let', or 'const' to declare variables.

Data Types:

JavaScript supports various data types, including numbers, strings, booleans, arrays, and objects.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<script>
// Internal JavaScript code
var age = 25;
let name = "John";
const PI = 3.14;
var number = 42;
var text = "Hello, World!";
var isTrue = true;
var fruits = ['apple', 'banana', 'orange'];
var person = { name: 'John', age: 30 };
</script>
</body>
</html>

Chapter 2: Control Flow and Functions

Section 2.1: Conditional Statements

if Statement:

Used to execute a block of code if a specified condition is true.

Switch Statement:

A multi-case decision-making structure.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<script>
// Internal JavaScript code
var age = 18;
if (age >= 18) { console.log("You are an adult."); }
else {
console.log("You are a minor.");
}
var day = "Monday";
switch (day) {
case "Monday":
console.log("It's the start of the week."); break;
// ... other cases
}
</script>
</body>
</html>

Section 2.2: Loops

for Loop:

Executes a block of code a specified number of times.

while Loop:

Repeatedly executes a block of code as long as a specified condition is true.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<script>
// Internal JavaScript code
for (var i = 0; i < 5; i++) {
console.log("Iteration: " + i); }
var count = 0;
while (count < 3) {
console.log("Count: " + count);
count++;
}
</script>
</body>
</html>

Section 2.3: Functions

Function Declaration:

A set of instructions grouped together to perform a specific task.

Arrow Function:

A concise way to write functions in JavaScript.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<script>
// Internal JavaScript code
function greet(name) { console.log("Hello, " + name + "!"); }
greet("John");
const square = (num) => num * num;
console.log(square(5));
</script>
</body>
</html>

Chapter 3: Working with the DOM

Section 3.1: Introduction to the DOM

Accessing Elements:

Interacting with HTML elements using JavaScript.

Manipulating Elements:

Modifying the content and attributes of HTML elements.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<h1 id="main-heading">Original Heading</h1>
<script>
// Internal JavaScript code
var heading = document.getElementById
("main-heading");
heading.innerHTML = "New Heading";
</script>
</body>
</html>

Section 3.2: Event Handling

Adding Event Listeners:

Responding to user actions on a webpage.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<button id="myButton">Click Me</button>
<script>
// Internal JavaScript code
var button = document.getElementById("myButton");
button.addEventListener("click", function() {
console.log("Button clicked!");
});
</script>
</body>
</html>

Chapter 4: Advanced JavaScript Concepts

Section 4.1: Objects and Classes

Object Creation:

Creating and working with objects.

Class Definition:

Defining and using classes in JavaScript.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<script>
// Internal JavaScript code
var car = {
brand: "Toyota",
model: "Camry",
year: 2022,
start: function() {
console.log("Engine started!");
}
};
class Animal {
constructor(name) {
this.name = name;
}
speak() {
console.log(this.name + " makes a sound.");
}
}
var dog = new Animal("Dog");
dog.speak();
</script>
</body>
</html>

Section 4.2: Asynchronous JavaScript

Callback Functions:

Handling asynchronous operations using callbacks.

Promises:

Managing asynchronous tasks with promises.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style>
/* Internal CSS code */
body { font-family: 'Arial', sans-serif; }
</style>
</head>
<body>
<script>
// Internal JavaScript code
function fetchData(callback) {
setTimeout(function() {
var data = "Fetched data";
callback(data);
}, 2000);
}
fetchData(function(result) {
console.log(result);
});
function fetchDataPromise() {
return new Promise(function(resolve, reject) {
setTimeout(function() {
var data = "Fetched data";
resolve(data);
}, 2000);
});
}
fetchDataPromise()
.then(function(result) {
console.log(result);
})
.catch(function(error) {
console.error(error);
});
</script>
</body>
</html>

Download JavaScript Book Now

JavaScript

Notes for Professionals


YouTube Channels To learn JS:

Channel's for JS Videos

Error Makes Clever Academy :

Key Points:

Highlights

Tutor Joe's Stanley :

Key Points:

Highlights:

Tamil Hacks 2.0 :

Key Points:

Highlights:

Hands-On Projects:

Project 1: Interactive Quiz App

Objective: Create an interactive quiz application with multiple-choice questions.

Features:

Project 2: To-Do List

Objective: Build a to-do list application with the ability to add, edit, and delete tasks.

Features:

Project 3: Image Slider

Objective: Develop an image slider that automatically cycles through a set of images.

Features:

Project 4: Weather App

Objective: Create a weather application that fetches and displays weather information based on user input.

Features:

Project 5: Memory Game

Objective: Build a classic memory game where users match pairs of cards.

Features:


Brian Kernighan Quotes

Brian Kernighan

“Don't comment bad code - rewrite it.”