Spread operator for object literals
This feature is currently Stage 3 and is implemented by Firefox stable, Chrome stable, Safari Preview, and Node stable.
This is really useful for shallow cloning objects:
let objClone = { ...obj };
References:
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styfle
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Patrick Kettner
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Since this is a javascript feature, it is actually not implemented by the edge team (who monitors this uservoice) but by the Chakra team, who implement the javascript engine used by Edge. Since Chakra is open source, you can track status on their github here - https://github.com/Microsoft/ChakraCore/issues/3406. Once it is implemented there, Edge will inherit it shortly there after.