There are some methods using reserved word "delete", such as
Map.prototype.delete, Set.prototype.delete... Though it is allowed since
ES5, I think we'd better avoid it because it cause es6 shim solution fail
on legacy browsers such as IE8.



--
hax
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There are some methods using reserved word "delete", such as
Map.prototype.delete, Set.prototype.delete... Though it is allowed since
ES5, I think we'd better avoid it because it cause es6 shim solution fail
on legacy browsers such as IE8.