Another question to volatile()

[jankopriva]

Hi all,

I have run into issue with volatile being a reserved word in js. That means that older tools like yuicompressor and javascript lint will not work with new ember apps. I noticed pull request #957 Don't use reserved word 'volatile' for non-cached properties
with explanation that this is EC3 vs EC5 issues.

However, not only closure compiler but also other tools fail and I would like to know what's the ember community view on this:
Definitely stick with volatile keyword in ember or patch the old tools to remove volatile check restriction?

Also, I am not sure, whether using volatile does not break IE8 functionality.

Thanks.

[trek]

Is this related to #957?

[jankopriva]

yes, but it showed to be a problem not with closure compiler but with other tools too.

[trek]

Gotcha. Should have read a bit closer. This is a question better suited for @wycats.

[wagenet]

@jankopriva Can you give me examples of actual libraries that fail? I'm not seeing failures on current JSLint. We've also tested in IE8 without any visible issues related to volatile.

[jankopriva]

yuicompressor https://github.com/yui/yuicompressor/
http://www.javascriptlint.com/docs/index.htm

I realize javascript lint is quite old and probably not developed any more, but yuicompressor is quite popular.

[wagenet]

@jankopriva Hmm, this does seem to be reserved in YUI Compressor. In my opinion, this is a bug in YUI. They have removed other previously reserved words for ES5 but have only done a partial job. I can't see any point in reserving ES3 words when they are no longer reserved in ES5 and were never used in ES3.

[jankopriva]

Ok, thanks for the answer. I will patch yuicompressor, then.

[leon]

It also breaks in Rhino saying org.mozilla.javascript.EvaluatorException: missing name after . operator

[wagenet]

Looks like YUICompressor is deprecated http://www.yuiblog.com/blog/2012/10/16/state-of-yui-compressor/.
We'll still need to consider Rhino.

[wycats]

@wagenet If someone can demonstrate problems in any browser (IE6?, IE7? IE8?), I'll reconsider. Just supporting extremely old non-browser environments that are not up-to-date with modern JavaScript is not a good enough reason imho.

[wagenet]

@wycats Sounds good to me.

[krumpi]

Hi

I'm trying to run an ember precompiler for the play framework and I'm getting affected but the usage of the volatile keyword.

The error given by rhino is
org.mozilla.javascript.EvaluatorException: missing name after . operator (ember-1.0.0-pre.2.js#3106)

where we have the definition of
ComputedPropertyPrototype.volatile

Changing the language version in Rhino has no effect
could we reconsider changing the name?

[benmccann]

I've run into this with Closure Compiler as well. I had to add the following to my plovr config:
"experimental-compiler-options": {
"languageIn": "ECMASCRIPT5"
}

[sandstrom]

Note: people trying the closure compiler web ui can use // @language ECMASCRIPT5