Vue.js in 2025 - FireflyFolio

## Limitations **Talent market**: smaller pool than React (especially in large enterprises/ESNs). **UI standardization**: diverse library options (Vuetify, PrimeVue, Naive UI) require early governance to avoid heterogeneity. **Enterprise guidelines**: some advanced patterns (a11y, extended state, architecture) need explicit internal conventions compared to Angular. … ### Production watch‑outs **State management**: favor local state and composables; reserve **Pinia**for cross‑domain sharing. **Performance**: route‑level lazy loading, bundle control, performance budgets (LCP/INP/CLS), SSR/SG where SEO matters. **Accessibility**: choose a headless library or a standardized UI kit; automate audits. **Quality**: strict TypeScript, ESLint/Prettier, CI pipelines (lint/tests/a11y/perf), structured code reviews. **Security**: hardened SSR, CSP policy, limited … ## Migration (guidelines) **Vue 2 → Vue 3**: component‑by‑component migration, move to **Pinia**, adopt `<script setup>`, establish test coverage before refactoring. **Legacy → Vue/Nuxt**: target critical journeys first, measure perf/SEO, then generalize. # Technical Overview ... **Vue 3.5+**is the stable baseline in 2025; **3.6**introduces **Vapor Mode**(opt‑in, experimental) for performance gains on complex views. **Composition API**+ `<script setup>`everywhere; … ... **Vue 3.5 “Titan”**: template/compiler optimizations, stability and performance. **Vue 3.6 (alpha/experimental)**: **Vapor Mode**(no virtual DOM; compiles to fine‑grained DOM operations). **Opt‑in**for heavy screens (large lists, dashboards). … ## Migration & quick roadmap **Vue 2 → Vue 3**: plan progressive refactoring (Compat mode if needed), migrate Router 3→4, move to Pinia, remove mixins; Options API can remain but favor Composition API. **Nuxt 2 → Nuxt 4**: rebuild on app/ + server/ (Nitro), map middlewares, layouts, plugins. Check module equivalents (i18n, images, auth). **Reactivity Transform**: remove ... ## Production checklist - Strict TypeScript ( `"strict": true`) - ESLint + Prettier + CI (PR blocking) - Unit tests >80% on key domains - E2E smoke on critical journeys (auth, cart, payment, etc.) - A11y audit (axe DevTools) - Performance budget (LCP/INP/CLS) + RUM monitoring - Security (CSP, headers, secrets, deps) - Observability (logs, traces, metrics) - Backups & rollbacks (feature flags, canary) - Incident playbooks (SLA, on‑call) … ## When to consider Vapor Mode **Very dense lists**, dashboards with numerous nodes and frequent updates. **Low‑power targets**(entry‑level mobile devices). **Rendering constraints**where virtual DOM overhead becomes significant. **Approach**: enable **per view**/ **per component**, compare against VDOM using profiling. Keep a VDOM **fallback** while Vapor remains experimental.