Who contributed to Vue.js on September 3, 2026?

2 developers shipped this update, including btea and zhiyuanzmj.

What were the notable Vue.js updates?

feat(ssr): enable `throwUnhandledErrorInProduction` (#5419), refactor(vapor): collapse slot outlet forwarding flags to a 2-bit mode, and refactor(vapor): split NON_STABLE slot marker out of VaporSlotFlags.

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Sep 3, 2026

$ the-wire · showcase

VitePress enables production error throwing, JSX Vapor refines slots and types

By RepoJournal · Filed 06:56 UTC on September 3, 2026 · About Vue.js

2 people shipped this

zhiyuanzmj @zhiyuanzmj 3 cited

btea @btea 1 cited

VitePress now surfaces unhandled SSR errors in production, while JSX Vapor streamlines slot internals and preserves union component props.

VitePress enabled `throwUnhandledErrorInProduction`, so production builds now throw unhandled errors during SSR instead of silently swallowing them [1].

In vue-jsx-vapor, the NON_STABLE slot marker was split out of VaporSlotFlags and slot outlet forwarding flags were collapsed to a 2-bit mode [2][3]. A separate fix preserves union component props in type definitions, resolving the case where a component's props were incorrectly narrowed [4].

Action items

→ Review VitePress SSR error handling if you rely on graceful degradation in production vuejs/vitepress [plan]
→ Test union component props in vue-jsx-vapor after the type fix vuejs/vue-jsx-vapor [monitor]

References

[1] feat(ssr): enable `throwUnhandledErrorInProduction` (#5419) ↗ vuejs/vitepress
[2] refactor(vapor): collapse slot outlet forwarding flags to a 2-bit mode ↗ vuejs/vue-jsx-vapor
[3] refactor(vapor): split NON_STABLE slot marker out of VaporSlotFlags ↗ vuejs/vue-jsx-vapor
[4] fix(types): preserve union component props ↗ vuejs/vue-jsx-vapor

$ ls vuejs/reviews/ # the step-back reads

the week in review VitePress resolves frontmatter during markdown rendering the month in review Vue's monthly grind: tooling stability and VitePress rewrites mark August

Topics: JavaScript Full archive →

Quick answers

What shipped in Vue.js on September 3, 2026?: VitePress now surfaces unhandled SSR errors in production, while JSX Vapor streamlines slot internals and preserves union component props. In total, 5 commits and 2 pull requests landed.
Who contributed to Vue.js on September 3, 2026?: 2 developers shipped this update, including btea and zhiyuanzmj.
What were the notable Vue.js updates?: feat(ssr): enable `throwUnhandledErrorInProduction` (#5419), refactor(vapor): collapse slot outlet forwarding flags to a 2-bit mode, and refactor(vapor): split NON_STABLE slot marker out of VaporSlotFlags.

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$ log @vuejs --recent

2026-09-07 Vue core fixes suspense hydration edge cases in stacked PRs 13 shipped 2026-09-06 Vue.js: no material update 1 shipped 2026-09-05 Vitest Browser Mode config sharing fix lands in Vue Test Utils 22 shipped 2026-09-04 create-vue bumps @vue/test-utils to ^2.5.0 1 shipped

$ log --all # elsewhere on the wire

Meta 2026-09-07 React Native adds Stable API guards to renderer attributed string FastAPI & Pydantic 2026-09-07 Pydantic fixes Mypy plugin crash, tightens datetime constraints

$ ls showcases/

$ init your-desk

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