Avoid triggering getters

[jonathantneal]

@WebReflection may have mentioned in #4 that I should avoid checking !document.loaded, as it may trigger getters. I’m wondering if I should instead use !('loaded' in document), or what best practice I should follow.

[WebReflection]

considering one of your solutions there is to lazily assign on get, I think you answered your own question already ;-)

It's a trap either ways, but using in does not involve extra, most likely unnecessary, logic.

[jonathantneal]

Since feature detection is not part of a ponyfill, I’ll close this. Thanks for your assistance.