On May 4, 2009, at 9:35 PM, Garrett Smith wrote:
In previous discussion of ES4 (now obsolete), someone (Brendan?)
mentioned ||= and &&= short-circuit operators. I was interested, but
have heard nothing further on the topic.
Was the idea abandoned?
Not at all, but some discussion involving ??= instead kind of trailed
off. See
https://mail.mozilla.org/pipermail/es5-discuss/2008-August/
thread.html#502
I think ||= makes sense given the extant JS idiom: var foo = arg ||
defaultFoo; that is widely used.
&&= doesn't have a real-world use-case.
??= and ?? are too narrowly typed for JS.
/be
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