Decode HTML entities in a provided string.

decodeEntities.js

//https://stackoverflow.com/questions/5796718/html-entity-decode
var decodeEntities = (function() {
  // this prevents any overhead from creating the object each time
  var element = document.createElement('div');
  function decodeHTMLEntities (str) {
    if(str && typeof str === 'string') {
      // strip script/html tags
      str = str.replace(/<script[^>]*>([\S\s]*?)<\/script>/gmi, '');
      str = str.replace(/<\/?\w(?:[^"'>]|"[^"]*"|'[^']*')*>/gmi, '');
      element.innerHTML = str;
      str = element.textContent;
      element.textContent = '';
    }
    return str;
  }
  return decodeHTMLEntities;
})();