Learn HYPERAPP with Real Code Examples
Updated Nov 23, 2025
Architecture
Elm-like functional design
State + Actions + View model
Pure update flow
Virtual DOM diffing
Subscription-based side effects
Rendering Model
Virtual DOM diffing
Pure view functions
Subscription-driven re-renders
Efficient keyed updates
DOM patching
Architectural Patterns
Functional state management
Component composition
Pure update flow
Effect-driven subscriptions
Unidirectional UI updates
Real World Architectures
IoT device dashboards
Admin widgets
Chrome/Firefox extensions
Small SPAs
Embedded UIs in enterprise software
Design Principles
Functional purity
Minimal bundle size
Predictable updates
No hidden magic
Composable architecture
Scalability Guide
Split into components early
Share state through top-level app
Use subscriptions for async tasks
Group actions logically
Avoid deeply nested VDOM
Migration Guide
Hyperapp 1 -> 2 uses simpler API
Replace old `h()` signatures
Update subscriptions
Remove deprecated helpers
Refactor class components (if any)