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https://issues.apache.org/jira/browse/TINKERPOP-1489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15655320#comment-15655320
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ASF GitHub Bot commented on TINKERPOP-1489:
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Github user jbmusso commented on the issue:
https://github.com/apache/tinkerpop/pull/450
Ah, it looks like [nashorn supports let and const keywords on
8u40](http://fr.slideshare.net/akihironishikawa/nashorn-in-the-future-en) so we
could swap `var` for `let` and `const` unless we want to target earlier
versions of Java8. I don't think adding a transpiler such as Babeljs to the mix
is worth the trouble here since it's going to be a nightmare to maintain the
build pipeline. However, it *could* make sense for more recent versions of
Node. Node 7 would be happier with ES2015 code rather than ES5 ;) - see
http://node.green/. I don't think it's realistic so I'm just putting it here
for further reference, basically when Java9 is out (where [nashorn could fully
support
ES2015/6](http://fr.slideshare.net/akihironishikawa/nashorn-in-the-future-en)).
Note that there is [a proposal for adding async iterator to
JavaScript](https://github.com/tc39/proposal-async-iteration). It's currently
in stage 3 so this could make it to the EcmaScript specification. Using
`.next()` for async iteration might become a reality.
> Provide a Javascript Gremlin Language Variant
> ---------------------------------------------
>
> Key: TINKERPOP-1489
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1489
> Project: TinkerPop
> Issue Type: Improvement
> Components: language-variant
> Reporter: Jorge Bay
>
> It would be nice to have a Javascript Gremlin Language Variant that could
> work with any ES5 runtime, specially the ones that support
> [CommonJs|http://requirejs.org/docs/commonjs.html], like Node.js.
> Nashorn, the engine shipped with JDK 8+, does not implement CommonJs but
> provides [additional
> extensions|https://wiki.openjdk.java.net/display/Nashorn/Nashorn+extensions]
> making modular JavaScript possible. Nashorn should be supported in order to
> run glv tests under the same infrastructure (JDK8).
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