@aeva There was a proposal on the gitlab a while ago: https://gitlab.gnome.org/GNOME/glib/-/issues/3596
But, long story short, they won't support wasm unless something big happens, like a dedicated maintainer.
Its their choice of course, but IMO, it indirectly hinders Vala on other domains and it has left it as a niche language.
Adding a "non glib" batteries included support for the language would open a decent alternative to C# ](my main objective on all of this).
I might bite the bullet, who knows.