const s = `[
	null,
	true,
	false,
	-1,
	3.14,
	"a string",
	{ "a-number": "-123" },
	{ "a-bigint": "-123n" }
]`;

const parsed = JSON.parse(s, bigIntReviver);
const s2 = JSON.stringify(parsed);

console.log(parsed);
console.log(s2);

console.log(typeof parsed[6]["a-number"])
console.log(typeof parsed[7]["a-bigint"])