Since Javascript can run on the browser and the server, e.g. [[20221021122456-isomorphic-js]], sometimes code needs to check to see where you are.
This is usually done through a typeof window === "undefined" check. If it's true, you're on the server. Otherwise, you're in the browser.
[[deno]] actually supports window, making this check break. Instead, use a typeof document check. This works in both node and Deno.