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JavaScript DOM Quick Start for Developers

Build Interactive Websites with JavaScript DOM - Start Your Frontend Career Today!

4.3
Beginner

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JavaScript DOM Quick Start for Developers
5 Modules
March 2026
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Course Curriculum

5 Modules · 11 Chapters · 18 Topics · 189 Sub-topics

01
Foundation
1 Chapters · 1 Topics · 14 Sub-topics
Introduction to the DOM
1 Topics
DOM Fundamentals
14 Sub-topics
What is the Document Object Model
DOM as a Programming Interface
How Browsers Build the DOM
DOM vs HTML Source Code
DOM Tree Visualization
Understanding Nodes
Node Types Overview
Element Nodes vs Text Nodes
Comment Nodes and Document Nodes
DOM and JavaScript Relationship
Browser Developer Tools for DOM
Inspecting DOM in DevTools
Live DOM Editing
DOM Specifications and Standards
02
Essential Selection
2 Chapters · 2 Topics · 29 Sub-topics
Selecting DOM Elements - Basic Methods
1 Topics
Basic Selection Methods
14 Sub-topics
Document Object Introduction
getElementById Method
getElementById Return Values
getElementsByClassName Method
Working with HTMLCollection
getElementsByTagName Method
getElementsByName Method
Selecting by Multiple Criteria
Case Sensitivity in Selection
Null and Empty Returns
Selecting the Document Root
Selecting Head and Body Elements
Best Practices for Element Selection
Performance of Selection Methods
Selecting DOM Elements - Modern Methods
1 Topics
Query Selectors
15 Sub-topics
querySelector Method Introduction
CSS Selector Syntax Basics
Selecting by ID with querySelector
Selecting by Class with querySelector
Selecting by Attribute
Complex CSS Selectors
Pseudo-class Selectors
querySelectorAll Method
Working with NodeList
NodeList vs HTMLCollection
Converting NodeList to Array
Scoped Queries
querySelector on Elements
Performance Considerations
Choosing Between Selection Methods
03
Essential Manipulation
3 Chapters · 7 Topics · 55 Sub-topics
Reading DOM Content
3 Topics
Text and HTML Content
7 Sub-topics
Accessing Text Content
textContent Property
innerText Property
textContent vs innerText
innerHTML Property
outerHTML Property
innerHTML vs outerHTML
Form Values
8 Sub-topics
Reading Form Values
value Property for Inputs
Reading Checkbox and Radio States
Reading Select Dropdowns
Reading Textarea Content
Reading Hidden Input Values
nodeValue Property
data Property for Text Nodes
Element Dimensions
5 Sub-topics
Reading Element Dimensions
clientWidth and clientHeight
offsetWidth and offsetHeight
scrollWidth and scrollHeight
getBoundingClientRect Method
Modifying DOM Content
3 Topics
Setting Content
9 Sub-topics
Setting Text Content
Using textContent for Safe Updates
Setting innerHTML
innerHTML Security Concerns
Setting outerHTML
Replacing Elements with outerHTML
insertAdjacentHTML Method
insertAdjacentHTML Positions
insertAdjacentText Method
Form Manipulation
5 Sub-topics
Setting Form Values
Updating Input Values
Updating Checkbox and Radio
Updating Select Options
Updating Textarea Content
Safe Content Updates
4 Sub-topics
Modifying Element Content Safely
XSS Prevention Techniques
Sanitizing User Input
Content Update Best Practices
Working with CSS Classes
1 Topics
Class Manipulation
17 Sub-topics
className Property
Limitations of className
classList Property Introduction
classList.add Method
Adding Multiple Classes
classList.remove Method
Removing Multiple Classes
classList.toggle Method
Toggle with Force Parameter
classList.contains Method
classList.replace Method
classList.item Method
Iterating Over classList
classList Length Property
Dynamic Class Management
Class-Based State Management
CSS Class Best Practices
04
Essential Events
3 Chapters · 4 Topics · 50 Sub-topics
DOM Events - Introduction
1 Topics
Event Fundamentals
16 Sub-topics
What are DOM Events
Event-Driven Programming Concept
Event Types Categories
Mouse Events Overview
Keyboard Events Overview
Form Events Overview
Focus Events Overview
Document Events Overview
Window Events Overview
Touch Events Overview
Drag Events Overview
Clipboard Events Overview
Media Events Overview
Event Naming Conventions
Event Object Introduction
Browser Event Support
Event Handlers and Listeners
2 Topics
Adding Event Handlers
9 Sub-topics
Inline Event Handlers
Why Avoid Inline Handlers
Event Handler Properties
onclick Property Pattern
Handler Property Limitations
addEventListener Method
addEventListener Syntax
Event Type Parameter
Listener Function Parameter
Event Listener Options
10 Sub-topics
Options Parameter
once Option
passive Option
capture Option
signal Option for AbortController
removeEventListener Method
Matching Listeners for Removal
Anonymous Function Pitfall
Multiple Listeners Per Event
Listener Order of Execution
Event Delegation
1 Topics
Delegation Pattern
15 Sub-topics
Event Delegation Concept
Why Use Event Delegation
Performance Benefits
Dynamic Element Handling
Implementing Basic Delegation
Using event.target
Matching Target Elements
closest Method for Delegation
matches Method for Delegation
Delegating Multiple Event Types
Delegation Patterns
Handling Nested Targets
Delegation Limitations
When Not to Delegate
Delegation Best Practices
05
Quick Reference
2 Chapters · 4 Topics · 41 Sub-topics
Browser Storage - localStorage
2 Topics
localStorage Fundamentals
11 Sub-topics
Web Storage Introduction
localStorage Overview
Storage Availability Check
setItem Method
getItem Method
removeItem Method
clear Method
key Method
length Property
Iterating Over localStorage
Storage Limits
Advanced localStorage
7 Sub-topics
Storing Complex Data
JSON Stringify and Parse
Storage Event
Cross-Tab Communication
localStorage Security
Private Browsing Behavior
localStorage Best Practices
Fetch API
2 Topics
Basic Fetch
13 Sub-topics
Fetch API Introduction
fetch Function Syntax
Basic GET Request
Response Object
Checking Response Status
response.ok Property
response.status Property
Parsing Response Body
response.json Method
response.text Method
response.blob Method
response.arrayBuffer Method
response.formData Method
Request Configuration
10 Sub-topics
POST Requests
Request Options Object
Setting HTTP Method
Headers Object
Setting Request Headers
Sending JSON Data
Sending FormData
credentials Option
mode Option
cache Option

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