2.0.1

Fix GetMethod abstract operation to be up to date with the spec. (@UltCombo, #6)

2.0.0

Require io.js instead of an outdated Node.js™ version with the buggy --harmony flag.

Remove @@create and related abstract operations CreateFromConstructor and OrdinaryConstruct, to follow the spec.

Use the real Symbol.iterator as the value of the "@@iterator" export from the "especially/well-known-symbols" module.

Rename EnqueueTask to EnqueueJob, to follow the spec.

Add Call and GetV abstract operations.

Update Invoke abstract operation now that it's in the spec instead of in a comment in the promises-unwrapping issue tracker.

Add SpeciesConstructor abstract operation, and the "@@species" well-known symbol (which is synthesized from scratch, since V8 does not have Symbol.species support yet).

1.8.3

Fix a bad ToString algorithm that would give incorrect results for objects like { valueOf() { return "wrong"; } toString() { return "right"; }.

1.8.2

Protect against some, but not all, modifications to global objects and methods. Math operations should now be safe, as should all To* abstract operations (e.g. ToBoolean, ToNumber, ToLength, etc.).

1.8.1

Make abs and min math operations allow infinities. This is a speculative fix based on how I believe ECMAScript bug #3114 will be fixed.

1.8.0

Adds more date/time-related abstract operations: MakeDate, MakeDay, MakeTime, and TimeClip. (@mathiasbynens, #4)

1.7.0

Adds lots of date/time-related abstract operations: DateFromTime, Day, DayFromYear, DaysInYear, DayWithinYear, InLeapYear, MonthFromTime, TimeFromYear, TimeWithinDay, YearFromTime. (@mathiasbynens, #1)

1.6.0

Adds HasProperty and SameValueZero.

This release brings Especially up to the level of having enough functionality for the Array.prototype.contains reference implementation. We now power two projects, instead of just one!

1.5.0

Adds the "especially/math" module, containing sign, floor, abs, and min.

1.4.0

Adds ToNumber, ToInteger, and ToLength.