I would be pro-killing this particular misfeature. I know we have tests that verify that we accept the syntax, but i'm not sure if there's still *real* content the depends on it.
Does strict mode disallow it? IIRC strict mode has a blanket ban on non-reference lhs in assignment expressions but I don't have the spec handy. --Oliver On Jun 19, 2013, at 7:40 AM, Jason Orendorff <[email protected]> wrote: > The program > > if (0) Math.sin(0) = 1; > alert("OK"); > > is permitted in all the major browsers. This was explicitly optional in > ES1-5, but dropped from ES6: > > https://github.com/rwldrn/tc39-notes/blob/master/es6/2012-11/nov-29.md#eliminate-functions-returning-reference-values-from-the-specification > > And good riddance, if we really think implementations can drop support for > this cursed-legacy syntax. I'm willing to experiment with making this an > early ReferenceError in Firefox. But if anyone has tried and run into Web > compatibility issues, please speak up and save me some wasted effort! > > Thanks, > -j > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss
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