Caitlin Potter wrote:
One reason it might make sense to throw, is people converting values
to string names for use as object properties. Reason you'd want to
throw would be to prevent accidentally making the key useless
(different from its original Symbol value).
This is exactly the reason.
Of course, having String(x) and '' + x diverge is funky, but not novel:
js> o = {valueOf(){return 42}, toString(){return 'haha'}}
({valueOf:function valueOf(){return 42}, toString:function
toString(){return 'haha'}})
js> String(o)
"haha"
js> ''+o
"42"
/be
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