Orta Therox, making the big announcement on behalf of the Svelte team:

We think it’ll give you a much nicer development experience — one that also scales beautifully to larger Svelte code bases — regardless of whether you use TypeScript or JavaScript.

Up until now TypeScript was usable with Svelte, but not officially supported by the project. What does that official support look like?

• You can use TypeScript inside your <script> blocks — just add the lang="ts" attribute
• Components with TypeScript can be type-checked with the svelte-check command
• You get autocompletion hints and type-checking as you’re writing components, even in expressions inside markup
• TypeScript files understand the Svelte component API — no more red squiggles when you import a .svelte file into a .ts module

I know a lot of people have been waiting for this. Congrats to all involved on a big release!