Store Architecture: Feature Modules
Organize stores into feature modules with encapsulated actions and selectors.
Store Architecture: Feature Modules is a free Sveltejs Academy lesson on CoddyKit — lesson 1 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Sveltejs Academy learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Why Feature Modules
Large apps benefit from organizing stores by feature: cart/, auth/, orders/.
Each Module Exports
Each module exports state, derived values, and actions for that feature.
// $lib/cart/store.js
export const items = writable([]);
export function add(item) { items.update(i => [...i, item]); }Encapsulation
Internal store details stay in the module; consumers use exported actions.
Selectors
Provide derived selectors for common queries.
export const total = derived(items, ($items) => $items.reduce((s, i) => s + i.price, 0));Testing
Each feature can be tested in isolation without spinning up the whole app.
Composition
Compose features by importing what you need; avoid implicit cross-dependencies.
Naming Conventions
Adopt consistent naming so consumers know where to look.
TypeScript Models
Define types in the feature module and export them alongside the store.
Lazy Initialization
For per-route features, lazy-import the module when the route is visited.
Cross-Feature Coordination
Use an event bus or a higher-level orchestrator to coordinate without coupling.
Scaling
Feature modules scale well: each team owns its feature folder.
Quick Check
What is the main benefit of feature modules?
Recap
Organize stores into feature modules with state, actions, and selectors. Export a clean API per feature.
Frequently asked questions
Is the “Store Architecture: Feature Modules” lesson free?
Yes — the full text of “Store Architecture: Feature Modules” is free to read here on the web, and the Sveltejs Academy course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Sveltejs Academy course, upgrade to CoddyKit PRO.
What will I learn in “Store Architecture: Feature Modules”?
Organize stores into feature modules with encapsulated actions and selectors. You practise Sveltejs Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Sveltejs Academy?
No prior experience is required. Sveltejs Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 1 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Store Architecture: Feature Modules” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Sveltejs Academy lesson?
Yes. Every Sveltejs Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Store Architecture: Feature Modules
- Event Bus Pattern with Stores
- Optimistic UI Updates
- Undo/Redo with Store History