Kursinnhold

Advanced JavaScript Mastery

1. Mastering JavaScript Classes and Inheritance

Getting Started Understanding Class Declarations in JavaScript Challenge: Create a JavaScript Class Defining Methods in JavaScript Classes Challenge: Add Methods to a Class Using Parameter Objects Working with Private Properties in Classes Challenge: Implement Private Properties in a Class Managing Properties with Getters and Setters Challenge: Implement Getters and Setters in a Class Exploring Static Properties in JavaScript Using Static Methods in JavaScript Challenge: Implement Static Properties and Methods in a Class Understanding Inheritance with extends and super()Challenge: Implement Class Inheritance with extends and super()

2. DOM Manipulation for Interactive Web Development

What Is the Document Object Model (DOM)?Querying and Selecting Elements in the DOM Challenge: Query and Select DOM Elements Understanding the DOM Hierarchy and Relationships Challenge: Navigate the DOM Hierarchy Exploring DOM Properties in JavaScript Working with Element Attributes in the DOM Challenge: Manage Element Properties and Attributes Adding Elements to the DOM Dynamically Removing Elements From the DOM Challenge: Add and Remove DOM Elements Modifying Element Styles with JavaScript Challenge: Apply Dynamic Styles to DOM Elements

3. Event Handling and User Interactions in JavaScript

Introduction to Events and Event Listeners Understanding the Event Object in JavaScript Challenge: Implement Event Listeners Event Propagation and Delegation Explained Challenge: Handle Event Propagation and Delegation Working with Keyboard and Mouse Events Managing and Removing Event Listeners

4. Asynchronous JavaScript and API Integration

Introduction to Asynchronous JavaScript Understanding Callbacks in JavaScript Handling Asynchronous Operations with Promises Using Async/Await for Cleaner Asynchronous Code Fetching and Working with APIs in JavaScript Integrating APIs in JavaScript Applications Challenge: Fetch and Use API Data Integrating Third-Party Libraries in JavaScript Challenge: Work with Third-Party Libraries Handling Multiple Asynchronous Requests

Exploring DOM Properties in JavaScript

JavaScript provides several properties to access and manipulate the content. Understanding these properties allows you to dynamically update the content of web pages based on user interactions or other conditions.

InnerHTML

The innerHTML property allows you to get or set the HTML content of an element, including tags and text. It is one of the most commonly used properties for dynamically updating page content.

index.html

index.js

The innerHTML retrieves all the content, including HTML tags, and allows for inserting or updating content with HTML tags.

TextContent

The textContent property gets or sets the text content of an element, stripping out any HTML tags. It's ideal when you need to work with plain text without considering the HTML structure.

index.html

index.js

The textContent retrieves text content only, ignoring HTML tags, and sets plain text, automatically escaping any tags.

Value

The value property is used with form elements like <input>, <textarea>, and <select>, allowing you to get or set the value entered by the user.

index.html

index.js

The value retrieves the current value of form elements and sets a new value for input, textarea, or select elements.

Differences Between InnerHTML and TextContent

Practical Example: Updating a User Profile

Imagine a user profile page where initial data is displayed, and the user can update their profile details using a form. When the user submits the form, the content on the page updates dynamically.

index.html

index.css

index.js

Initially, the profile displays a predefined username and bio, which can be modified through input fields. When the "Save Changes" button is clicked, JavaScript updates the displayed profile: textContent updates the username as plain text, while innerHTML updates the bio to allow for basic HTML formatting, reflecting any edits the user makes.

1. What does the `innerHTML` property do?

2. When would you use `textContent` instead of `innerHTML`?

3. What will the following code output?

4. Which property is used to get or set the value of an `<input>` element?

What does the innerHTML property do?

Select the correct answer

It retrieves only the text content of an element.

It gets or sets the HTML content of an element, including tags and text.

It retrieves the value of an input field.

It only retrieves child nodes of an element.

When would you use textContent instead of innerHTML?

Select the correct answer

When you need to set or retrieve content as plain text, without HTML tags.

When you want to add multiple child elements.

When you need to set HTML with tags.

When working with input elements.

What will the following code output?

Select the correct answer

Hello, <strong>World!</strong>

Hello, World!

<strong>World!</strong>

World!

Which property is used to get or set the value of an <input> element?

Select the correct answer

textContent

innerHTML

value

placeholder

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Hvordan kan vi forbedre det?

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Seksjon 2. Kapittel 6

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Kursinnhold

Advanced JavaScript Mastery

1. Mastering JavaScript Classes and Inheritance

2. DOM Manipulation for Interactive Web Development

3. Event Handling and User Interactions in JavaScript

4. Asynchronous JavaScript and API Integration

Exploring DOM Properties in JavaScript

InnerHTML

The innerHTML property allows you to get or set the HTML content of an element, including tags and text. It is one of the most commonly used properties for dynamically updating page content.

index.html

index.js

The innerHTML retrieves all the content, including HTML tags, and allows for inserting or updating content with HTML tags.

TextContent

The textContent property gets or sets the text content of an element, stripping out any HTML tags. It's ideal when you need to work with plain text without considering the HTML structure.

index.html

index.js

The textContent retrieves text content only, ignoring HTML tags, and sets plain text, automatically escaping any tags.

Value

The value property is used with form elements like <input>, <textarea>, and <select>, allowing you to get or set the value entered by the user.

index.html

index.js

The value retrieves the current value of form elements and sets a new value for input, textarea, or select elements.

Differences Between InnerHTML and TextContent

Practical Example: Updating a User Profile

Imagine a user profile page where initial data is displayed, and the user can update their profile details using a form. When the user submits the form, the content on the page updates dynamically.

index.html

index.css

index.js

1. What does the `innerHTML` property do?

2. When would you use `textContent` instead of `innerHTML`?

3. What will the following code output?

4. Which property is used to get or set the value of an `<input>` element?

What does the innerHTML property do?

Select the correct answer

It retrieves only the text content of an element.

It gets or sets the HTML content of an element, including tags and text.

It retrieves the value of an input field.

It only retrieves child nodes of an element.

When would you use textContent instead of innerHTML?

Select the correct answer

When you need to set or retrieve content as plain text, without HTML tags.

When you want to add multiple child elements.

When you need to set HTML with tags.

When working with input elements.

What will the following code output?

Select the correct answer

Hello, <strong>World!</strong>

Hello, World!

<strong>World!</strong>

World!

Which property is used to get or set the value of an <input> element?

Select the correct answer

textContent

innerHTML

value

placeholder

Alt var klart?

Hvordan kan vi forbedre det?

Takk for tilbakemeldingene dine!

Seksjon 2. Kapittel 6

Advanced JavaScript Mastery

Exploring DOM Properties in JavaScript

InnerHTML

TextContent

Value

Differences Between InnerHTML and TextContent

Practical Example: Updating a User Profile

1. What does the innerHTML property do?

2. When would you use textContent instead of innerHTML?

3. What will the following code output?

4. Which property is used to get or set the value of an <input> element?

Advanced JavaScript Mastery

Exploring DOM Properties in JavaScript

InnerHTML

TextContent

Value

Differences Between InnerHTML and TextContent

Practical Example: Updating a User Profile

1. What does the innerHTML property do?

2. When would you use textContent instead of innerHTML?

3. What will the following code output?

4. Which property is used to get or set the value of an <input> element?

1. What does the `innerHTML` property do?

2. When would you use `textContent` instead of `innerHTML`?

4. Which property is used to get or set the value of an `<input>` element?

1. What does the `innerHTML` property do?

2. When would you use `textContent` instead of `innerHTML`?

4. Which property is used to get or set the value of an `<input>` element?