Twoslash

Add twoslash after the language, then hover the code to see types. They are worked out while the deck is generated, so no TypeScript reaches the browser.

```ts twoslash
const count = Math.max(1, 2)
//    ^?
```

// ^? shows the type of the word above the ^.

A block that does not compile is shown without types, with a warning in the output. The twoslash: dev|build switch of Slidev is not read.