[SvelteKit] (official Svelte framework) uses TypeScript quite a bit.
First, the internal code was ported to TypeScript, then DX for TypeScript was added. The official template supports JSDoc TS (default), TypeScript, or no typing.
I think another community member added TS support, and Rich said he couldn't have done it by himself. (Or maybe that was regarding the VS Code TS support tooling.)
[SvelteKit] (official Svelte framework) uses TypeScript quite a bit.
First, the internal code was ported to TypeScript, then DX for TypeScript was added. The official template supports JSDoc TS (default), TypeScript, or no typing.
I think another community member added TS support, and Rich said he couldn't have done it by himself. (Or maybe that was regarding the VS Code TS support tooling.)
[SvelteKit]: https://kit.svelte.dev/