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There's been a lot of talk [1] about promises on es-discuss in the last week or so. It looks like an effort is underway with a view to standardising them as part of the language in the ES7 spec, possibly with a harmonised DOMPromises spec to come sooner than that for use in the W3C recommendation track.

The other recent development in this area was the announcement of Promises/A+ [2], an attempt to clarify all of the behavioural aspects of JS promises in a single spec that many implementations can support.

All in all, I'd say that things are moving very healthily forward in this regard.

[1] https://mail.mozilla.org/pipermail/es-discuss/2012-November/...

[2] https://github.com/promises-aplus/promises-spec

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