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Viewing: unescape.js

var toString = require('./toString'),
    unescapeHtmlChar = require('./_unescapeHtmlChar');

/** Used to match HTML entities and HTML characters. */
var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
    reHasEscapedHtml = RegExp(reEscapedHtml.source);

/**
 * The inverse of `_.escape`; this method converts the HTML entities
 * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
 * their corresponding characters.
 *
 * **Note:** No other HTML entities are unescaped. To unescape additional
 * HTML entities use a third-party library like [_he_](https://mths.be/he).
 *
 * @static
 * @memberOf _
 * @since 0.6.0
 * @category String
 * @param {string} [string=''] The string to unescape.
 * @returns {string} Returns the unescaped string.
 * @example
 *
 * _.unescape('fred, barney, &amp; pebbles');
 * // => 'fred, barney, & pebbles'
 */
function unescape(string) {
  string = toString(string);
  return (string && reHasEscapedHtml.test(string))
    ? string.replace(reEscapedHtml, unescapeHtmlChar)
    : string;
}

module.exports = unescape;

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