twitst4tz

twitter statistics web application
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index.js (1362B)

      1 /*!
      2  * escape-html
      3  * Copyright(c) 2012-2013 TJ Holowaychuk
      4  * Copyright(c) 2015 Andreas Lubbe
      5  * Copyright(c) 2015 Tiancheng "Timothy" Gu
      6  * MIT Licensed
      7  */
      8 
      9 'use strict';
     10 
     11 /**
     12  * Module variables.
     13  * @private
     14  */
     15 
     16 var matchHtmlRegExp = /["'&<>]/;
     17 
     18 /**
     19  * Module exports.
     20  * @public
     21  */
     22 
     23 module.exports = escapeHtml;
     24 
     25 /**
     26  * Escape special characters in the given string of html.
     27  *
     28  * @param  {string} string The string to escape for inserting into HTML
     29  * @return {string}
     30  * @public
     31  */
     32 
     33 function escapeHtml(string) {
     34   var str = '' + string;
     35   var match = matchHtmlRegExp.exec(str);
     36 
     37   if (!match) {
     38     return str;
     39   }
     40 
     41   var escape;
     42   var html = '';
     43   var index = 0;
     44   var lastIndex = 0;
     45 
     46   for (index = match.index; index < str.length; index++) {
     47     switch (str.charCodeAt(index)) {
     48       case 34: // "
     49         escape = '&quot;';
     50         break;
     51       case 38: // &
     52         escape = '&amp;';
     53         break;
     54       case 39: // '
     55         escape = '&#39;';
     56         break;
     57       case 60: // <
     58         escape = '&lt;';
     59         break;
     60       case 62: // >
     61         escape = '&gt;';
     62         break;
     63       default:
     64         continue;
     65     }
     66 
     67     if (lastIndex !== index) {
     68       html += str.substring(lastIndex, index);
     69     }
     70 
     71     lastIndex = index + 1;
     72     html += escape;
     73   }
     74 
     75   return lastIndex !== index
     76     ? html + str.substring(lastIndex, index)
     77     : html;
     78 }