Svelte 5: Classes not being found when used on components

[matheustavarestrindade]

Describe the bug

Classes are not being generated when we pass down to components.

example code of class not working:

If we change the class to a HTML element it works like a charm:

Reproduction

https://svelte.dev/playground/5e9be9c0d62c4e41b7979cbd7df5ef94?version=5.0.5

Logs

No response

System Info

System:
    OS: Windows 10 10.0.19045
    CPU: (24) x64 AMD Ryzen 9 5900X 12-Core Processor
    Memory: 105.06 GB / 127.91 GB
  Binaries:
    Node: 20.12.1 - C:\Program Files\nodejs\node.EXE
    npm: 10.8.2 - C:\Program Files\nodejs\npm.CMD
    bun: 1.1.29 - ~\AppData\Roaming\npm\bun.CMD
  Browsers:
    Edge: Chromium (127.0.2651.74)
    Internet Explorer: 11.0.19041.4355
  npmPackages:
    svelte: ^5.0.5 => 5.0.5

Severity

annoyance

[Conduitry]

A class prop on a component is not a class attribute, and is uninvolved with styling. There's no element with the stats-card class when you write <Card class='stats-card'>.