juniorPWA
What is App Shell architecture?
Updated May 17, 2026
Short answer
App Shell is the minimal UI structure cached for fast loading.
Deep explanation
It includes core UI components like header, navigation, and layout while dynamic content is loaded separately.
Real-world example
Gmail uses app shell for instant UI rendering.
Common mistakes
- Caching dynamic content as static shell.
Follow-up questions
- Why use app shell?
- What is dynamic content?