locutus
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Locutus other languages' standard libraries to JavaScript for fun and educational purposes
72 lines (71 loc) • 3 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.htmlspecialchars = htmlspecialchars;
function htmlspecialchars(string, quoteStyle, charset, doubleEncode) {
// discuss at: https://locutus.io/php/htmlspecialchars/
// original by: Mirek Slugen
// improved by: Kevin van Zonneveld (https://kvz.io)
// bugfixed by: Nathan
// bugfixed by: Arno
// bugfixed by: Brett Zamir (https://brett-zamir.me)
// bugfixed by: Brett Zamir (https://brett-zamir.me)
// revised by: Kevin van Zonneveld (https://kvz.io)
// input by: Ratheous
// input by: Mailfaker (https://www.weedem.fr/)
// input by: felix
// reimplemented by: Brett Zamir (https://brett-zamir.me)
// note 1: charset argument not supported
// example 1: htmlspecialchars("<a href='test'>Test</a>", 'ENT_QUOTES')
// returns 1: '<a href='test'>Test</a>'
// example 2: htmlspecialchars("ab\"c'd", ['ENT_NOQUOTES', 'ENT_QUOTES'])
// returns 2: 'ab"c'd'
// example 3: htmlspecialchars('my "&entity;" is still here', null, null, false)
// returns 3: 'my "&entity;" is still here'
let optTemp = 0;
let noquotes = false;
let quoteStyleValue = quoteStyle;
if (typeof quoteStyleValue === 'undefined' || quoteStyleValue === null) {
quoteStyleValue = 2;
}
let encoded = string || '';
encoded = encoded.toString();
if (doubleEncode !== false) {
// Put this first to avoid double-encoding
encoded = encoded.replace(/&/g, '&');
}
encoded = encoded.replace(/</g, '<').replace(/>/g, '>');
const OPTS = {
ENT_NOQUOTES: 0,
ENT_HTML_QUOTE_SINGLE: 1,
ENT_HTML_QUOTE_DOUBLE: 2,
ENT_COMPAT: 2,
ENT_QUOTES: 3,
ENT_IGNORE: 4,
};
const isOptKey = (value) => Object.hasOwn(OPTS, value);
if (quoteStyleValue === 0) {
noquotes = true;
}
if (typeof quoteStyleValue !== 'number') {
// Allow for a single string or an array of string flags
const quoteStyleFlags = (Array.isArray(quoteStyleValue) ? quoteStyleValue : [quoteStyleValue]).map((flag) => String(flag));
for (const flag of quoteStyleFlags) {
// Resolve string input to bitwise e.g. 'ENT_IGNORE' becomes 4
if (flag === 'ENT_NOQUOTES') {
noquotes = true;
}
else if (isOptKey(flag) && OPTS[flag]) {
optTemp |= OPTS[flag];
}
}
quoteStyleValue = optTemp;
}
const resolvedQuoteStyle = typeof quoteStyleValue === 'number' ? quoteStyleValue : optTemp;
if (resolvedQuoteStyle & OPTS.ENT_HTML_QUOTE_SINGLE) {
encoded = encoded.replace(/'/g, ''');
}
if (!noquotes) {
encoded = encoded.replace(/"/g, '"');
}
return encoded;
}