Null-safe property access (and conditional assignment) in ES6/2015

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Is there a null-safe property access (null propagation / existence) operator in ES6 (ES2015/JavaScript.next/Harmony) like ?. in CoffeeScript for example? Or is it planned for ES7?

var aThing = getSomething()
...
aThing = possiblyNull?.thing

This will be roughly like:

if (possiblyNull != null) aThing = possiblyNull.thing

Ideally the solution should not assign (even undefined) to aThing if possiblyNull is null

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