At the last TC39 meeting we discussed the addition of the following items[0]:
Number.MAX_SAFE_INTEGER = (2^53)-1 Number.isInteger - Infinity => false - NaN => false - value !== truncated value => false - -0 => true Number.isSafeInteger - -0 => true This resolution of record doesn't include a consensus on these extensions as defined, but IIRC there was consensus on Mark's proposal. Jeff Walden noted[1] that there was no clear resolution and I apologize for this oversight. Rick [0] https://github.com/rwaldron/tc39-notes/blob/master/es6/2013-07/july-25.md#59-semantics-and-bounds-of-numberisinteger-and-numbermax_integer [1] https://bugzilla.mozilla.org/show_bug.cgi?id=885798#c12
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