es.json.stringify.js
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	var $ = require('../internals/export');
	var getBuiltIn = require('../internals/get-built-in');
	var apply = require('../internals/function-apply');
	var call = require('../internals/function-call');
	var uncurryThis = require('../internals/function-uncurry-this');
	var fails = require('../internals/fails');
	var isArray = require('../internals/is-array');
	var isCallable = require('../internals/is-callable');
	var isObject = require('../internals/is-object');
	var isSymbol = require('../internals/is-symbol');
	var arraySlice = require('../internals/array-slice');
	var NATIVE_SYMBOL = require('../internals/native-symbol');

	var $stringify = getBuiltIn('JSON', 'stringify');
	var exec = uncurryThis(/./.exec);
	var charAt = uncurryThis(''.charAt);
	var charCodeAt = uncurryThis(''.charCodeAt);
	var replace = uncurryThis(''.replace);
	var numberToString = uncurryThis(1.0.toString);

	var tester = /[\uD800-\uDFFF]/g;
	var low = /^[\uD800-\uDBFF]$/;
	var hi = /^[\uDC00-\uDFFF]$/;

	var WRONG_SYMBOLS_CONVERSION = !NATIVE_SYMBOL \|\| fails(function () {
	var symbol = getBuiltIn('Symbol')();
	// MS Edge converts symbol values to JSON as {}
	return $stringify([symbol]) != '[null]'
	// WebKit converts symbol values to JSON as null
	\|\| $stringify({ a: symbol }) != '{}'
	// V8 throws on boxed symbols
	\|\| $stringify(Object(symbol)) != '{}';
	});

	// https://github.com/tc39/proposal-well-formed-stringify
	var ILL_FORMED_UNICODE = fails(function () {
	return $stringify('\uDF06\uD834') !== '"\\udf06\\ud834"'
	\|\| $stringify('\uDEAD') !== '"\\udead"';
	});

	var stringifyWithSymbolsFix = function (it, replacer) {
	var args = arraySlice(arguments);
	var $replacer = replacer;
	if (!isObject(replacer) && it === undefined \|\| isSymbol(it)) return; // IE8 returns string on undefined
	if (!isArray(replacer)) replacer = function (key, value) {
	if (isCallable($replacer)) value = call($replacer, this, key, value);
	if (!isSymbol(value)) return value;
	};
	args[1] = replacer;
	return apply($stringify, null, args);
	};

	var fixIllFormed = function (match, offset, string) {
	var prev = charAt(string, offset - 1);
	var next = charAt(string, offset + 1);
	if ((exec(low, match) && !exec(hi, next)) \|\| (exec(hi, match) && !exec(low, prev))) {
	return '\\u' + numberToString(charCodeAt(match, 0), 16);
	} return match;
	};

	if ($stringify) {
	// `JSON.stringify` method
	// https://tc39.es/ecma262/#sec-json.stringify
	$({ target: 'JSON', stat: true, arity: 3, forced: WRONG_SYMBOLS_CONVERSION \|\| ILL_FORMED_UNICODE }, {
	// eslint-disable-next-line no-unused-vars -- required for `.length`
	stringify: function stringify(it, replacer, space) {
	var args = arraySlice(arguments);
	var result = apply(WRONG_SYMBOLS_CONVERSION ? stringifyWithSymbolsFix : $stringify, null, args);
	return ILL_FORMED_UNICODE && typeof result == 'string' ? replace(result, tester, fixIllFormed) : result;
	}
	});
	}

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