You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
74 lines
3.0 KiB
74 lines
3.0 KiB
'use strict';
|
|
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 isCallable = require('../internals/is-callable');
|
|
var isSymbol = require('../internals/is-symbol');
|
|
var arraySlice = require('../internals/array-slice');
|
|
var getReplacerFunction = require('../internals/get-json-replacer-function');
|
|
var NATIVE_SYMBOL = require('../internals/symbol-constructor-detection');
|
|
|
|
var $String = String;
|
|
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')('stringify detection');
|
|
// 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 $replacer = getReplacerFunction(replacer);
|
|
if (!isCallable($replacer) && (it === undefined || isSymbol(it))) return; // IE8 returns string on undefined
|
|
args[1] = function (key, value) {
|
|
// some old implementations (like WebKit) could pass numbers as keys
|
|
if (isCallable($replacer)) value = call($replacer, this, $String(key), value);
|
|
if (!isSymbol(value)) return value;
|
|
};
|
|
return apply($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;
|
|
}
|
|
});
|
|
}
|