53 lines
1.4 KiB
JavaScript
53 lines
1.4 KiB
JavaScript
'use strict';
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var $TypeError = require('es-errors/type');
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var callBound = require('call-bound');
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var forEach = require('../helpers/forEach');
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var isLeadingSurrogate = require('../helpers/isLeadingSurrogate');
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var isTrailingSurrogate = require('../helpers/isTrailingSurrogate');
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var $charCodeAt = callBound('String.prototype.charCodeAt');
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var $strSplit = callBound('String.prototype.split');
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var StringToCodePoints = require('./StringToCodePoints');
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var UnicodeEscape = require('./UnicodeEscape');
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var UTF16EncodeCodePoint = require('./UTF16EncodeCodePoint');
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var hasOwn = require('hasown');
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// https://262.ecma-international.org/12.0/#sec-quotejsonstring
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var escapes = {
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'\u0008': '\\b',
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'\u0009': '\\t',
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'\u000A': '\\n',
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'\u000C': '\\f',
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'\u000D': '\\r',
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'\u0022': '\\"',
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'\u005c': '\\\\'
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};
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module.exports = function QuoteJSONString(value) {
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if (typeof value !== 'string') {
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throw new $TypeError('Assertion failed: `value` must be a String');
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}
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var product = '"';
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if (value) {
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forEach($strSplit(StringToCodePoints(value), ''), function (C) {
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if (hasOwn(escapes, C)) {
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product += escapes[C];
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} else {
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var cCharCode = $charCodeAt(C, 0);
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if (cCharCode < 0x20 || isLeadingSurrogate(cCharCode) || isTrailingSurrogate(cCharCode)) {
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product += UnicodeEscape(C);
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} else {
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product += UTF16EncodeCodePoint(cCharCode);
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}
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}
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});
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}
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product += '"';
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return product;
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};
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