If you use Deno in order to build your new javascript-powered website you may use typescript. But you may also write javascript in a .ts file to iterate quick.
When you try to bundle, you may receive this error
error: TS7006 [ERROR]: Parameter 'id' implicitly has an 'any' type.
If you did the same thing as me, that being bundling to a ts-file this is the reason why.
Simply run: deno bundle app.ts app.bundle.js instead and it will work.