vue-frontend

Vue 3 Composition API lets you organize component logic by feature rather than lifecycle, using script setup syntax for concise, typed definitions. Group related state, computed properties, and methods together, then expose them via return statements or auto-unwrap with script setup, improving readability and reusability in scalable applications.

Define props and emits using TypeScript generics in script setup: use withDefaults() for default values and type emits as a union of event signatures. This provides IDE autocomplete, catches type errors at development time, and ensures parent-child communication remains type-safe across your component tree.

Configure lazy-loaded routes using dynamic imports with Vue Router: define route components as () => import('./Component.vue'). Pair this with provide/inject for state sharing across route layers and Composition API composables for route-aware logic, reducing initial bundle size and improving performance.

Yes, Pinia integrates seamlessly with Composition API. Define typed stores using defineStore(), access them in components with useStore(), and leverage TypeScript for automatic completion on state, getters, and actions, making reactive state management predictable and testable.

Use Vitest with Vue Test Utils to mount components and test composables in isolation. Test reactive state changes, prop validation, emitted events, and side effects without a browser, ensuring your Composition API logic is reliable before deployment.

Ensure WCAG 2.1 AA compliance by managing focus states, ARIA attributes, and keyboard navigation within Composition API components. Use composables to encapsulate accessible behavior (e.g., modal focus trapping, tab order management) and test with assistive technologies to verify real-world usability.