short question before oepning a PR:

the following bug is part of the sanbox code , but not necessarily from the playground website ,im also using it in my own site
ive checked the code, and it looks similar enough so i assume it could be considered a bug
(update: ive played around a bit on the website and it seems that due to the amount of entire page reloads ur doing this is not an issue here 🤔)

Page URL: local page

Issue:
in https://github.com/microsoft/TypeScript-Website/blob/v2/packages/sandbox/src/index.ts#L227

const code = editor.getModel()!.getValue()

im getting

TypeError: can't access property "getValue", editor.getModel() is null
textUpdated index.ts:227
createTypeScriptSandbox index.ts:246

coming from the setTimeout in
https://github.com/microsoft/TypeScript-Website/blob/v2/packages/sandbox/src/index.ts#L246

i think this is mainly caused when the editor is disposed before the setTimeout finishes

my PR would just be to return the function if the model isnt there currently , this way there at least isnt an error