| | |
| | | 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 $stringify = getBuiltIn('JSON', 'stringify'); |
| | | var re = /[\uD800-\uDFFF]/g; |
| | | var exec = uncurryThis(/./.exec); |
| | | var charAt = uncurryThis(''.charAt); |
| | | var charCodeAt = uncurryThis(''.charCodeAt); |
| | | var replace = uncurryThis(''.replace); |
| | | var numberToString = uncurryThis(1.0.toString); |
| | | |
| | | var tester = /[\uD800-\uDFFF]/g; |
| | | var low = /^[\uD800-\uDBFF]$/; |
| | | var hi = /^[\uDC00-\uDFFF]$/; |
| | | |
| | | var fix = function (match, offset, string) { |
| | | var prev = string.charAt(offset - 1); |
| | | var next = string.charAt(offset + 1); |
| | | if ((low.test(match) && !hi.test(next)) || (hi.test(match) && !low.test(prev))) { |
| | | return '\\u' + match.charCodeAt(0).toString(16); |
| | | } return match; |
| | | }; |
| | | 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)) != '{}'; |
| | | }); |
| | | |
| | | var FORCED = fails(function () { |
| | | // 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 |
| | | // https://github.com/tc39/proposal-well-formed-stringify |
| | | $({ target: 'JSON', stat: true, forced: FORCED }, { |
| | | $({ 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 result = $stringify.apply(null, arguments); |
| | | return typeof result == 'string' ? result.replace(re, fix) : result; |
| | | 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; |
| | | } |
| | | }); |
| | | } |