Enumeration order was indeed (finally) added to the ES2015 spec. Here's a link t... | Hacker News

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		WorldMaker on Dec 7, 2015 \| parent \| context \| favorite \| on: Microsoft Edge's JavaScript engine to go open-sour... Enumeration order was indeed (finally) added to the ES2015 spec. Here's a link to the release candidate spec for the [[OwnPropertyKeys]] algorithm: https://people.mozilla.org/~jorendorff/es6-draft.html#sec-or...

bzbarsky on Dec 8, 2015 [–]

[[OwnPropertyKeys]] is not invoked by a for-in loop. [[Enumerate]] is instead, and while it defines that the set of iterated names is the same as that returned by [[OwnPropertyKeys]] it explicitly says that order is not defined.

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