On Aug 7, 2013, at 4:08 AM, David Bruant wrote: > Hi, > > From http://qfox.nl/weblog/291 > Apparently, "f() = x" was forbidden as of ES5.1 (was still available in ES5 > apparently), but a jQuery plugin is using it [1] (path not triggered in > non-IE browsers). > Not breaking the web, all that. It should probably be brought back.
I'm not sure where that analysis came from? As far as I know there were no such changes in ES5.1 and the ES5.1 grammar clearly allows a function call to appear on the LHS of an assignment. That said, this is something we did discuss for ES6 and the current ES6 draft has a static semantic restriction that disallows assignment to the result of the function call. In addition, functions are no longer allowed to return Reference values. I don't see us changing the latter, so it comes down whether the error is reported as an early syntax error or a runtime TypeError. > > Syntax isn't my cup of tea, so I'll let others judge if a detail was > overlooked somewhere. > > Kudos to @kuvos on this one! > > David > > [1] http://www.thuisbezorgd.nl/scripts/jquery/jquery.placeholder-min.js > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss >
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