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Performance
1. How does loading="lazy" work for images?
Level: Expert | Frequency: High
2. What is the purpose of <link rel="preload">?
Level: Expert | Frequency: High
3. Difference between async and defer in script tags?
Level: Expert | Frequency: High
4. What is the role of <noscript>?
Level: Expert | Frequency: High
5. What is the Critical Rendering Path? How does HTML impact it?
Level: Expert | Frequency: High
6. How does HTML contribute to web performance?
Level: Expert | Frequency: High
All Topics
Basics
Common Tags
Attributes and Elements
Lists
Text tags and Formatting
Input and Forms
Block and Inline Elements
Box model
Semantic Tags
Links and Images
Media and Embeds
Tables
HTML entities
HTML and CSS
Performance
SEO
Security
Progressive Enhancement
HTML5
Custom Elements & Web Components
HTML5 APIs
SPAs
WCAG
Security
Best Practices