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Introduction
Quick start
Project structure
Learn
The mental model
Forgiving reactivity
State
Derived values
Effects
Control flow
Lists
Context
Suspense and resources
Data fetching
Error handling
Overview
A first example
What an ErrorBoundary catches
Resources and boundaries
catchError, onError and handleError
Errors nobody handles
Logging and reporting
Error codes
Root error reporters
Router error boundaries
Common mistakes
Reference
Transitions
Styling
Build a todo app
1. Set up the project
2. Write the first component
3. Render a list
4. Add todos with a form
5. Filters and derived state
6. Persistence and effects
8. Server render and build
Guides
State with useStore
Effects and lifecycle
Control flow in depth
Lists and keys
Server rendering
Accessibility
Performance
Bundle size
Benchmarks
Security
Extending ShadowJS
MDX and Markdown
Patterns
Dark mode
Debounced search
Optimistic updates
Infinite list
Sortable table
Form validation
Modal dialog
Accessible tabs
Keyboard shortcuts
Undo and redo
How it works
Reactivity model
Ownership
Scheduler and timing
Fine-grained rendering
Reconciliation
Hydration keys
Tooling
The compiler
The Vite plugin
create-shadow-app
Configuration
Migrate
Choose a path
From React
From React Router
From Preact
From Next.js
From Solid
From Socket.IO
From shadcn/ui and Radix
From Tailwind
Reference
Overview
Diagnostics
@shadow-js/core
@shadow-js/core/extend
@shadow-js/web
@shadow-js/web/extend
@shadow-js/web/server
@shadow-js/router
@shadow-js/compiler
@shadow-js/vite
create-shadow-app
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Error handling
Reference
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Reference
Reference in the Error handling guide.
For agents
Updated
2026-10-20
ErrorBoundary
,
ErrorBoundaryProps
catchError
,
onError
,
ErrorHandler
useResource
,
captureWarnings
Effects and lifecycle
,
Suspense and resources
Previous
Error handling: Common mistakes
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