var $ = require('../internals/export');
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var getBuiltIn = require('../internals/get-built-in');
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var fails = require('../internals/fails');
|
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var $stringify = getBuiltIn('JSON', 'stringify');
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var re = /[\uD800-\uDFFF]/g;
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var low = /^[\uD800-\uDBFF]$/;
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var hi = /^[\uDC00-\uDFFF]$/;
|
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var fix = function (match, offset, string) {
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var prev = string.charAt(offset - 1);
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var next = string.charAt(offset + 1);
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if ((low.test(match) && !hi.test(next)) || (hi.test(match) && !low.test(prev))) {
|
return '\\u' + match.charCodeAt(0).toString(16);
|
} return match;
|
};
|
|
var FORCED = fails(function () {
|
return $stringify('\uDF06\uD834') !== '"\\udf06\\ud834"'
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|| $stringify('\uDEAD') !== '"\\udead"';
|
});
|
|
if ($stringify) {
|
// `JSON.stringify` method
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// https://tc39.es/ecma262/#sec-json.stringify
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// https://github.com/tc39/proposal-well-formed-stringify
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$({ target: 'JSON', stat: true, forced: FORCED }, {
|
// 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;
|
}
|
});
|
}
|
