Monaco editor

An editor in the slide. Monaco is loaded only when a deck has one, and it needs no network.

```ts {monaco}
const message: string = 'edit me'
```

```ts {monaco-diff}
console.log('Original text')
~~~
console.log('Modified text')
```

• {monaco} is an editor with the code. Options go in a second brace: lines, readonly, height (initial, auto or a CSS size).
• {monaco-diff} shows two texts side by side, split by a line with ~~~.

Keys typed in an editor do not trigger slide shortcuts. A setup/monaco.ts file changes editor options for the whole deck, see Setup hooks.

Monaco does not load type definitions of packages (monacoTypesSource is not supported), so it does not know types from node_modules.

A deck with Monaco and Mermaid becomes a large script in an offline folder. See [Presenting offline](../guide/offline.md).