Vue.js: Vapor's Transition Magic Gets Smoother

Today we're diving into some crucial fixes for Vue's experimental Vapor mode that make transitions way more reliable. Edison1105 stepped up with two solid PRs that tackle those tricky edge cases where transitions would break when dealing with empty branches or complex conditional rendering scenarios.

Duration: PT3M36S

Episode overview

This episode is a short developer briefing from Vue.js.

It explains recent repository work in plain language.

  • Show: Vue.js
  • Published: 2026-03-07T11:52:15Z
  • Audio duration: PT3M36S

Transcript excerpt

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Hey there, Vue developers! Welcome back to another episode of the Vue.js podcast. I'm your host, and wow, do I have some satisfying fixes to share with you today. You know that feeling when you're working on a feature and you hit one of those weird edge cases that just makes everything fall apart? Well, today's…

So let's talk about what landed in the codebase. We've got two beautiful pull requests from Edison1105 that are all about making transitions work exactly the way you'd expect them to, even in those tricky scenarios that used to trip things up.

First up is PR 14535, and this one tackles a really specific but important issue with in-out transitions. Now, if you're working with Vapor mode and you've got transitions that need to handle cases where elements are leaving but there's no incoming element to replace them, this fix is going to be your new best…

The second PR, 14538, is like the perfect companion piece. This one focuses on out-in transitions when you've got an empty leaving branch. You know those moments where your conditional rendering creates a situation where something needs to transition out, but there's nothing actually there to transition? Yeah, that…

What's…

And…

Nearby episodes from Vue.js

  1. Vapor Gets Rock-Solid Hydration
  2. Vapor Compiler Gets Smarter with Expression Caching Fixes
  3. Vapor Mode Gets Smarter Expression Handling
  4. Custom Elements and Reactivity Polish Party
  5. Generics Get Real - When TypeScript Finally Cooperates
  6. Vapor Mode Gets Rock Solid - Interop Fixes and HMR Polish
  7. Vapor's Hydration Heroes Strike Again
  8. Vapor Hydration Gets a Critical Fix