[JulianMorrison]

It's still the Wrong Way™. You want to parse JSON, you write a lexer that recognizes its symbols and a parser that consumes them and spits the JS equivalent. Otherwise you are playing an eternal game of whack-a-mole with the JS eval parser. No. Just no.

[fforw]

If you can find a case in which the validator fails, it's wrong. Otherwise, if it's looks like a JSON parser and works like a JSON parser, i.e. is indistinguishable from a "proper" parser, it makes no sense but satisfying OCD to rework it.

Note that the code is now only a work-around for older browsers. Every modern browser supports native JSON parsing anyway.