1 | var $ = require('../internals/export');
|
2 | var getBuiltIn = require('../internals/get-built-in');
|
3 | var fails = require('../internals/fails');
|
4 |
|
5 | var $stringify = getBuiltIn('JSON', 'stringify');
|
6 | var re = /[\uD800-\uDFFF]/g;
|
7 | var low = /^[\uD800-\uDBFF]$/;
|
8 | var hi = /^[\uDC00-\uDFFF]$/;
|
9 |
|
10 | var fix = function (match, offset, string) {
|
11 | var prev = string.charAt(offset - 1);
|
12 | var next = string.charAt(offset + 1);
|
13 | if ((low.test(match) && !hi.test(next)) || (hi.test(match) && !low.test(prev))) {
|
14 | return '\\u' + match.charCodeAt(0).toString(16);
|
15 | } return match;
|
16 | };
|
17 |
|
18 | var FORCED = fails(function () {
|
19 | return $stringify('\uDF06\uD834') !== '"\\udf06\\ud834"'
|
20 | || $stringify('\uDEAD') !== '"\\udead"';
|
21 | });
|
22 |
|
23 | if ($stringify) {
|
24 |
|
25 |
|
26 |
|
27 | $({ target: 'JSON', stat: true, forced: FORCED }, {
|
28 |
|
29 | stringify: function stringify(it, replacer, space) {
|
30 | var result = $stringify.apply(null, arguments);
|
31 | return typeof result == 'string' ? result.replace(re, fix) : result;
|
32 | }
|
33 | });
|
34 | }
|