Advanced JavaScript Mastery

Advanced JavaScript Mastery

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1. Classes

Learn the fundamentals of JavaScript classes, from class declarations to defining methods that enhance functionality. Discover how to use parameter objects effectively, manage private properties, and control access with getters and setters. Master static properties and static methods and unlock the power of class inheritance using "extends" and "super()" to build scalable and reusable code.

Welcome to the Course

Class Declaration

Challenge: Building a Class

Challenge: Adding Methods to a Class

Parameter Object

Private Properties

Challenge: Implementing Private Properties in a Class

Getters and Setters

Challenge: Managing Properties with Getters and Setters

Static Properties

Challenge: Using Static Properties and Methods in a Class

Inheritance with extends and Using super()

Challenge: Class Inheritance with Extends and Using Super

2. DOM Manipulation

Master DOM manipulation to create dynamic, interactive web applications. Navigate and modify the DOM's structure, dynamically update content, and implement best practices for security and performance. Differentiate between properties and attributes to optimize your code.

What is the DOM?

Querying the DOM

Challenge: Querying the DOM

Understanding the DOM Hierarchy

Challenge: DOM Hierarchy

Working with Element Attributes

Challenge: Working with Element Properties and Attributes

Adding Elements

Removing Elements

Challenge: Adding and Removing Elements

Modifying Element Styles

Challenge: Modifying Element Styles

3. Events and Event Handling

Unlock the interactivity of your web applications by mastering JavaScript events. Understand event propagation, control event behavior, and implement efficient event handling for user interactions. Optimize performance with advanced techniques like event delegation.

Introduction to Events and Event Listeners

The Event Object

Challenge: Events and Event Listeners

Event Propagation and Delegation

Challenge: Event Propagation and Delegation

Keyboard and Mouse Events

Managing Event Listeners

4. Asynchronous JavaScript and APIs

This section covers the essentials of asynchronous JavaScript, including callbacks, Promises, and async/await. You’ll learn to fetch data from APIs, integrate third-party libraries, and handle multiple requests efficiently, building skills for creating data-driven applications.

Introduction to Asynchronous JavaScript

Working with APIs

Practical API Integration

Challenge: Working with API

Working with Third-Party Libraries

Challenge: Working with Third-Party Libraries

Handling Multiple Asynchronous Requests

Course Content

Advanced JavaScript Mastery

Advanced JavaScript Mastery

1. Classes

Welcome to the Course Class Declaration Challenge: Building a Class Class Methods Challenge: Adding Methods to a Class Parameter Object Private Properties Challenge: Implementing Private Properties in a Class Getters and Setters Challenge: Managing Properties with Getters and Setters Static Properties Static Methods Challenge: Using Static Properties and Methods in a Class Inheritance with extends and Using super()Challenge: Class Inheritance with Extends and Using Super

2. DOM Manipulation

What is the DOM?Querying the DOM Challenge: Querying the DOM Understanding the DOM Hierarchy Challenge: DOM Hierarchy DOM Properties Working with Element Attributes Challenge: Working with Element Properties and Attributes Adding Elements Removing Elements Challenge: Adding and Removing Elements Modifying Element Styles Challenge: Modifying Element Styles

3. Events and Event Handling

Introduction to Events and Event Listeners The Event Object Challenge: Events and Event Listeners Event Propagation and Delegation Challenge: Event Propagation and Delegation Keyboard and Mouse Events Managing Event Listeners

4. Asynchronous JavaScript and APIs

Introduction to Asynchronous JavaScript Callbacks Promises Async/Await Working with APIs Practical API Integration Challenge: Working with API Working with Third-Party Libraries Challenge: Working with Third-Party Libraries Handling Multiple Asynchronous Requests

Modifying Element Styles

In web development, we often need to modify the element styles dynamically. JavaScript provides two primary ways to change the appearance of elements: updating inline styles using the style property and managing classes with classList.

Changing Inline Styles Using the style Property

The style property in JavaScript allows you to directly modify the inline CSS of an HTML element. This method gives you full control over individual CSS properties but is limited to inline styles and only affects the specific element.

We can modify individual CSS properties using dot notation on the style object of an element. The property names are written in camelCase (e.g., backgroundColor instead of background-color).

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The style property is used to modify the inline styles of the #box element. Each CSS property is accessed as an individual JavaScript property (e.g., box.style.backgroundColor), allowing you to change specific aspects of the element's style dynamically.

Adding and Removing CSS Classes with classList

The classList property provides a more flexible and powerful way to manage the styles of an element by adding, removing, or toggling CSS classes. This method is more maintainable than directly modifying inline styles, as it allows you to take advantage of external CSS files and keep your styling separate from your JavaScript logic.

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classList.toggle() is used to add or remove the highlight class when the button is clicked. This method avoids cluttering the inline style attribute and relies on pre-defined CSS rules for maintainability.

Practical Example: Switching Themes

Let's take a practical example where the user can switch between a light and dark theme using classList.

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classList.replace() is used to swap the light-theme and dark-theme classes based on the current state.

1. Which property is used to modify inline styles of an element?

2. How would you change the background color of a `<div>` with an ID of `box` to coral using JavaScript?

3. What does the following code do?

Which property is used to modify inline styles of an element?

Select the correct answer

style

classList

getComputedStyle()

How would you change the background color of a <div> with an ID of box to coral using JavaScript?

Select the correct answer

document.getElementById('box').classList.add('coral');

document.getElementById('box').style.color = 'coral';

document.getElementById('box').style.backgroundColor = 'coral';

document.getElementById('box').setAttribute('backgroundColor', 'coral');

What does the following code do?

Select the correct answer

It adds the active class if it doesn't exist; removes it if it does.

It sets the active class as inline style on the button.

It only adds the active class without removing it.

It changes the background color to active.

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Section 2. Chapter 12

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