Can you share a bit more about the Symbol support in Chrome 38 onwards? I want to expand the compatibility data in MDN <https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Symbol> a bit with the latest information.
I understand that "Symbols" are supported. Symbol.iterator is supported and now Symbol.unscopables is also supported. What else? Do Symbol.for and Symbol.keyFor do everything they should? It also says Symbol.prototype.name exists only in V8 - was it removed? Thank you! ☆*PhistucK* On Thu, Aug 7, 2014 at 12:16 PM, Andy Wingo <[email protected]> wrote: > For-of ("for (x of iterable) {}") is a part of ES6 [1]. > > For-of has been shipping in Firefox since version 27 (February 2014) > [2]. IE and Safari developers have both shown willingness to implement > this part of the new language standard. > > V8 has had for-of since June 2013, under the --harmony-iteration flag. > It was recently changed to perform GetIterator [3] on the iterable, in > conformance with the draft standard. > > At the same time, we are looking to ship standard @@iterator methods for > arrays [4] and strings [5], so that one can iterate over arrays and > strings natively: > > for (var x of [1,2,3]) console.log(x); > > These @@iterator implementations make use of the new ES6 symbol facility > (also shipping in M38). > > V8's for-of implementation is complete with respect to the current draft > standard, except for the late spec addition that causes for-of to "shut > down" the iterator on early exit (via break or throw) [6]. We don't > anticipate problems adding this functionality later, as it relies on the > iterator having an optional "close" method, which no iterators have > currently. > > Owners: [email protected], [email protected] > > [1] > http://people.mozilla.org/~jorendorff/es6-draft.html#sec-for-in-and-for-of-statements > [2] https://developer.mozilla.org/en-US/Firefox/Releases/27#JavaScript > [3] http://people.mozilla.org/~jorendorff/es6-draft.html#sec-getiterator > [4] > http://people.mozilla.org/~jorendorff/es6-draft.html#sec-string-iterator-objects > [5] > http://people.mozilla.org/~jorendorff/es6-draft.html#sec-array-iterator-objects > [6] http://esdiscuss.org/notes/2014-06-05#closing-iterators > > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > -- -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
