juniorOptimisation
What is lazy loading?
Updated May 17, 2026
Short answer
Lazy loading delays loading resources until needed.
Deep explanation
It improves initial load time by deferring non-critical resources.
Real-world example
Images loading only when scrolling on websites.
Common mistakes
- Lazy loading critical content causing UI delay.
Follow-up questions
- What is eager loading?
- Where is lazy loading used?