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JavaScript IntersectionObserver

Efficient Visibility Detection

What You'll Learn

Master IntersectionObserver to efficiently detect when elements enter or leave the viewport. Perfect for lazy loading, infinite scroll, and animations.

Learning Objectives

  • Understand IntersectionObserver API
  • Implement lazy loading for images
  • Create infinite scroll functionality
  • Trigger animations on scroll
  • Apply observer best practices
Difficulty: Intermediate
Duration: 12 minutes
Prerequisites: JavaScript basics, DOM

Tutorial Lessons

Lesson 1: Mastering IntersectionObserver

Learn visibility detection, lazy loading, and best practices.

12 min read

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