Introduction to Pinia

export const useCartStore = defineStore('cart', { state: () => ({ items: [] }) })

// Topic: Introduction to Pinia
const store = { name: 'cart', items: 2 };
console.log(store.name + ':' + store.items);

// Expected Output: cart:2

• 1Keep cross-page client state in focused stores and reset sensitive state deliberately. Use the focus terms (introduction, to, pinia, reference U43705D) to keep this lesson tied to its exact Nuxt.js topic.
• 2Document Vue store layer integrated into Nuxt apps with focus terms: introduction, to, pinia, reference U43705D in the smallest useful page, layout, composable, store, server route, or deployment step.
• 3Represent every loading, success, denied, stale, and failure state that Introduction to Pinia can expose.
• 4Test SSR hydration, updates, persistence, logout reset, and store isolation. Include a check for these focus terms: introduction, to, pinia, reference U43705D.
• 5Use state consistency and hydration safety tracked for introduction, to, pinia, reference U43705D to guide improvements.
• 6Start with clear requirements and one minimal working example.
• 7Use meaningful names that explain business intent.
• 8Keep examples small enough to debug line by line.
• 9Validate input at every trust boundary.
• 10Handle errors explicitly and preserve useful context.
• 11Prefer simple control flow over deeply nested logic.
• 12Separate domain logic from I/O and framework code.
• 13Write tests for normal, boundary, and failure cases.
• 14Review security assumptions before production use.
• 15Measure performance before optimizing.
• 16Document non-obvious decisions close to the code or in project notes.
• 17Use official documentation when behavior is version-specific.
• 18Keep dependencies current and remove unused code.
• 19Avoid hardcoded secrets, credentials, and environment-specific paths.
• 20Log operational events without exposing sensitive data.
• 21Design examples so learners can safely modify and rerun them.
• 22Prefer maintainability over short-term cleverness.