I’m using Deno Fresh. In routes/indes.jsx I have:

import Test from "../islands/test.jsx";

export default function App() {
    return <Test></Test>

And in islands/test.jsx I have:

export default function Test() {
  if (undefined) {
    return <span>yo</span>
  } 
  return <span>hi</span>
}

It renders fine. However, if in line 2 it’s if (document), then the error document is not defined shows up. Why is that?