Vue 3.1

Vue 3.1 was an incremental Vue 3 release rather than a new major-version migration. It retained the Vue 3 application API, Composition API, compiler model, and component model introduced in 3.0, while incorporating fixes and refinements across the runtime, compiler, server-rendering, and TypeScript-facing packages. Later Vue 3 lines added further capabilities and accumulated additional compatibility, correctness, and tooling fixes, so 3.1 should not be treated as equivalent to a current Vue 3 release.

Vue 3.1 has reached end of life. Teams remaining on it no longer receive upstream fixes for defects or vulnerabilities found in this line, and must carry any necessary patches themselves. The practical risk grows as surrounding tooling moves forward: current ecosystem packages, compiler integrations, TypeScript versions, test tooling, and build plugins are generally validated against newer Vue versions. A frozen 3.1 deployment can therefore turn routine dependency upgrades into compatibility investigations, particularly for SSR and hydration paths, single-file component compilation, and applications that rely on framework-adjacent packages.

Plan an upgrade to a maintained Vue 3 release rather than attempting to extend 3.1 locally. Inventory all Vue-owned and Vue-coupled dependencies, including vue, the SFC compiler, server renderer where applicable, router, state-management libraries, component libraries, and build integrations; update compatible packages together instead of mixing compiler and runtime versions arbitrarily. Run the application’s unit, browser, type-checking, and production-build checks on the target version, with focused coverage for SSR or hydration, async components, transitions, custom directives, and generated SFC output. Review the migration guidance and changelogs for every intervening 3.x release, resolve deprecated usage and warnings, then deploy through the team’s normal staged rollout and monitoring process.