IO Examples
Practical, real world React examples of
IntersectionObserver API
No dependencies
Examples use only IntersectionObserver API. No external JavaScript or CSS libraries used in examples
React components
Each example is available as a React component. It is written in TypeScript and uses React hooks to manage internal states
Easy to understand
Each example contains one or two source files that have less than 100 lines of code. It's easy to understand and follow
Reusable patterns
A few patterns are used repeatedly such as making animations, lazy loading, etc. You can use them for your real use cases
Demo
Beginner
Elementary
Intermediate
Advanced
Animation
Don't animate an element unless users see it.
Effect
Toggle or add special effect to an element when it becomes visible.
Lazy Load
Only load an element when it's visible. It improves the loading performance of your page.
Sticky
Stick an element at the top or bottom of page. Because there are cases you can't use 'position: sticky'.
Tracking
Do something when users scroll to given position on the page.
IntersectionObserver API
Practical, real world React examples