2.3 released 27 April 2017, latest 2.3.4.
Vue 2.3 reached end of life on 13 July 2017.
What changed
Vue 2.3 added first-party server-side rendering capabilities and related tooling, making it practical to render Vue applications on the server rather than relying only on client-side rendering. It also added functional components for lightweight, stateless rendering, the v-once directive for rendering static content only once, and richer asynchronous component factories with loading and error states. These features expanded performance and SSR options beyond earlier Vue 2 releases, but they use APIs and conventions that have since evolved substantially.
What staying costs
Vue 2.3 has reached end of life, so defects and security issues in this release line will not receive fixes. Its dependency ecosystem is also increasingly incompatible with current tooling, browser targets, TypeScript versions, and Vue libraries. Teams remaining on 2.3 must carry old build tooling and transitive dependencies, face higher maintenance costs when upgrading adjacent packages, and have fewer practical options for resolving framework-level bugs. The gap to modern Vue is significant: later Vue 2 releases introduced useful compatibility features, while Vue 3 changed application creation, component APIs, slots, events, and several behavioral edge cases.
What to do
Treat migration off 2.3 as an active modernization project. First, inventory Vue plugins, build tooling, server-rendering code, global APIs, mixins, filters, deprecated patterns, and browser requirements. Add regression coverage around routing, state management, forms, component events, SSR or hydration, and critical user flows before changing framework versions. Upgrade to the latest Vue 2.7 release only as a short-lived compatibility step if it reduces the migration risk; do not treat it as a long-term destination. Then use the Vue 3 migration guidance and migration build where appropriate, replace Vue 2-only plugins with Vue 3-compatible alternatives, convert application bootstrap code to createApp, and address incompatible template, event, slot, and component API behavior. Roll out through a tested staging environment and monitor client errors, rendering mismatches, and bundle-size changes after deployment.
We can tell you what moving off Vue 2.3 involves.
What it takes to move off Vue 2.3 depends on what you built on it — the version you are on, how much depends on it, and how much of the work is mechanical. Leave your email with this version and we can tell you what that looks like for you.