1  var toString = require('./toString'),
 2      unescapeHtmlChar = require('./_unescapeHtmlChar');
 3  
 4  /** Used to match HTML entities and HTML characters. */
 5  var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
 6      reHasEscapedHtml = RegExp(reEscapedHtml.source);
 7  
 8  /**
 9   * The inverse of `_.escape`; this method converts the HTML entities
10   * `&`, `<`, `>`, `"`, and `'` in `string` to
11   * their corresponding characters.
12   *
13   * **Note:** No other HTML entities are unescaped. To unescape additional
14   * HTML entities use a third-party library like [_he_](https://mths.be/he).
15   *
16   * @static
17   * @memberOf _
18   * @since 0.6.0
19   * @category String
20   * @param {string} [string=''] The string to unescape.
21   * @returns {string} Returns the unescaped string.
22   * @example
23   *
24   * _.unescape('fred, barney, & pebbles');
25   * // => 'fred, barney, & pebbles'
26   */
27  function unescape(string) {
28    string = toString(string);
29    return (string && reHasEscapedHtml.test(string))
30      ? string.replace(reEscapedHtml, unescapeHtmlChar)
31      : string;
32  }
33  
34  module.exports = unescape;