Comment by masswerk

Regarding that choice: Given that this is really a different library (the DOM and its individual browser implementation), it's probably quite sane to just define a certain object to evaluate as falsy, as compared to any attempts to check for a certain implementation in this external library for any call.

(Even more so, since any access using `document.all` retrieves an object from a live collection, while the other access method is a function call, which is a totally different thing.)