Here is an example of using TwoSlash with Shiki:

console.log((1 + 2 + 3 + 4).to
toExponential
toFixed
toLocaleString
toPrecision
toStringFixed(2))

interface Todo {
  title: string
}

const todo: Readonly<Todo> = {
  title: 'Delete inactive users',
}

todo.title = 'Hello'
Cannot assign to 'title' because it is a read-only property.

Try hovering on each token to see the type information. Shiki runs oniguruma to give syntax highlighting, and TwoSlash runs typescript to give type information. Both are quite heavy libraries, but this is done ahead of time on building, it means that what you see here is completely static pure HTML and CSS!

The Shiki integration allows you to provide custom renderer of how the HTML been generated based on AST. This allows us to have dual themes support, and also the syntax highlighting for the type information.

Check @shikijs/twoslash and commit for the integration on antfu.me, for more information :)

```ts twoslash
// @errors: 2540
console.log((1 + 2 + 3 + 4).toFixed(2))
//                            ^|

interface Todo {
  title: string
}

const todo: Readonly<Todo> = {
  title: 'Delete inactive users',
//  ^?
}

todo.title = 'Hello'
```