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JavaScript DOM Course for Advanced

Elite DOM mastery - Build blazing-fast, enterprise-grade web applications!

4.6
Advance

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JavaScript DOM Course for Advanced
6 Modules
March 2026
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Course Curriculum

6 Modules · 13 Chapters · 28 Topics · 251 Sub-topics

01
Foundation Review
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
Advanced Events
4 Chapters · 9 Topics · 76 Sub-topics
Mouse Events Deep Dive
2 Topics
Mouse Event Types
10 Sub-topics
Mouse Event Types
click Event
dblclick Event
mousedown and mouseup Events
Event Order: mousedown, mouseup, click
mousemove Event
mouseenter and mouseleave Events
mouseover and mouseout Events
enter/leave vs over/out
contextmenu Event
Mouse Event Properties
10 Sub-topics
MouseEvent Properties
clientX and clientY
pageX and pageY
screenX and screenY
offsetX and offsetY
button and buttons Properties
Detecting Mouse Buttons
Modifier Keys in Mouse Events
relatedTarget Property
Mouse Event Best Practices
Keyboard Events Deep Dive
3 Topics
Keyboard Event Types
5 Sub-topics
Keyboard Event Types
keydown Event
keyup Event
keypress Event (Deprecated)
Event Order for Key Events
Keyboard Event Properties
9 Sub-topics
KeyboardEvent Properties
key Property
code Property
key vs code
Modifier Key Properties
altKey, ctrlKey, shiftKey, metaKey
repeat Property
isComposing Property
getModifierState Method
Keyboard Implementation
5 Sub-topics
Detecting Key Combinations
Keyboard Shortcuts Implementation
Focus and Keyboard Events
Keyboard Accessibility
Keyboard Event Best Practices
Form Events Deep Dive
2 Topics
Form Event Types
14 Sub-topics
Form Event Types Overview
submit Event
Handling Form Submission
Preventing Default Submit
reset Event
input Event
change Event
input vs change
focus Event
blur Event
focusin and focusout Events
select Event
invalid Event
Form Validation Events
FormData API
6 Sub-topics
FormData API Introduction
Creating FormData
Accessing Form Data
Modifying Form Data
Submitting with FormData
Form Event Best Practices
Custom Events
2 Topics
Creating Custom Events
9 Sub-topics
Why Custom Events
Event Constructor
Creating Basic Custom Events
CustomEvent Constructor
detail Property
Passing Data with Custom Events
dispatchEvent Method
Bubbling Custom Events
Cancelable Custom Events
Custom Event Patterns
8 Sub-topics
Listening for Custom Events
Custom Event Naming
Namespacing Custom Events
Custom Events for Components
Event-Driven Architecture
Pub/Sub with Custom Events
Custom Events vs Callbacks
Custom Event Best Practices
03
Observers
3 Chapters · 6 Topics · 58 Sub-topics
Intersection Observer API
3 Topics
Observer Basics
8 Sub-topics
Intersection Observer Introduction
Use Cases for Intersection Observer
Creating an Observer
Observer Callback Function
IntersectionObserverEntry Object
isIntersecting Property
intersectionRatio Property
boundingClientRect Property
Observer Configuration
7 Sub-topics
Observer Options
root Option
rootMargin Option
threshold Option
observe Method
unobserve Method
disconnect Method
Practical Applications
4 Sub-topics
Lazy Loading Images
Infinite Scroll with IO
Animation on Scroll
IO Best Practices
Mutation Observer API
2 Topics
Observer Setup
11 Sub-topics
Mutation Observer Introduction
When to Use Mutation Observer
Creating a Mutation Observer
Observer Callback Function
MutationRecord Object
type Property
target Property
addedNodes and removedNodes
previousSibling and nextSibling
attributeName Property
oldValue Property
Observer Configuration
11 Sub-topics
observe Method
Observer Configuration Options
childList Option
attributes Option
characterData Option
subtree Option
attributeOldValue Option
disconnect Method
takeRecords Method
Mutation Observer Use Cases
Performance Considerations
Resize Observer API
1 Topics
Resize Observer
17 Sub-topics
Resize Observer Introduction
Use Cases for Resize Observer
Creating a Resize Observer
Observer Callback
ResizeObserverEntry Object
contentRect Property
borderBoxSize Property
contentBoxSize Property
target Property
observe Method
unobserve Method
disconnect Method
Observing Multiple Elements
Responsive Components
Container Queries Alternative
Performance Considerations
Resize Observer Best Practices
04
Performance
2 Chapters · 4 Topics · 39 Sub-topics
Performance Optimization - DOM
2 Topics
Reflow and Repaint
8 Sub-topics
DOM Performance Overview
Reflow and Repaint
What Triggers Reflow
What Triggers Repaint
Layout Thrashing
Avoiding Layout Thrashing
Batching DOM Reads/Writes
requestAnimationFrame for Batching
DOM Optimization
12 Sub-topics
Document Fragments
Virtual DOM Concepts
Minimizing DOM Access
Caching DOM References
Event Delegation for Performance
Passive Event Listeners
Debouncing and Throttling
Lazy Loading
Code Splitting for DOM
Memory Leaks in DOM
Detached DOM Elements
Performance Measurement Tools
Performance Optimization - Events
2 Topics
Event Performance
8 Sub-topics
Event Performance Overview
Too Many Event Listeners
Event Delegation Benefits
Passive Event Listeners
When to Use Passive
once Option Usage
Removing Unused Listeners
Listener Memory Leaks
Throttling and Debouncing
11 Sub-topics
Debouncing Events
Implementing Debounce
Throttling Events
Implementing Throttle
Leading vs Trailing
requestAnimationFrame Throttling
Scroll Event Optimization
Resize Event Optimization
Input Event Optimization
Touch Event Optimization
Event Performance Monitoring
05
Security
1 Chapters · 3 Topics · 20 Sub-topics
Security in DOM Applications
3 Topics
XSS Prevention
9 Sub-topics
DOM Security Overview
Cross-Site Scripting (XSS)
Types of XSS Attacks
DOM-Based XSS
Preventing XSS
Safe Content Insertion
textContent vs innerHTML
Sanitizing User Input
DOMPurify Library Concept
Content Security
5 Sub-topics
Content Security Policy
CSP Headers
CSP and Inline Scripts
Trusted Types API
eval Security Risks
Frame Security
6 Sub-topics
iframe Security
sandbox Attribute
postMessage Security
Origin Validation
Third-Party Script Safety
Security Best Practices
06
Advanced Patterns
2 Chapters · 5 Topics · 44 Sub-topics
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
Fetch API - Advanced Topics
3 Topics
Error Handling
4 Sub-topics
Error Handling in Fetch
Network Errors vs HTTP Errors
try-catch with Fetch
Handling HTTP Errors
Request Control
5 Sub-topics
AbortController Introduction
Creating AbortController
Cancelling Fetch Requests
Fetch Timeout Implementation
signal Option
Advanced Features
12 Sub-topics
Request Object
Creating Request Objects
Cloning Requests
Response Object Details
Cloning Responses
Streaming Responses
ReadableStream Basics
Progress Tracking
CORS Overview
CORS Headers
Handling CORS Errors
Fetch Best Practices

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