Bug: <Transition component overwrites child’s className during SSR when using fragment rendering

Bug: <Transition component overwrites child’s className during SSR when using fragment rendering: a task in LegoFlow-SWE (Harbor dataset). When the <Transition component (in both React and Vue versions of Headless UI) is used with as={Fragment} (React) or as="template" (Vue), along with…

The task

When the `<Transition>` component (in both React and Vue versions of Headless UI) is used with `as={Fragment}` (React) or `as="template"` (Vue), along with `show={true}` and `appear={true}`, the component incorrectly replaces the child element’s `className` during Server-Side Rendering (SSR) instead of merging the…

Part of Lego-X/LegoFlow-SWE.