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. This is 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, and your progress syncs across the web and the CoddyKit app. The Sveltejs Academy course includes 4 lessons in total.
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.
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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. 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. The Sveltejs Academy course includes 4 lessons in total.
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, so you can start here or from the beginning and move at your own pace. This is lesson 1 of 4.
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