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node_modules/escape-html/index.js 1.33 KB
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f7563de62   Palak Handa   first commit 
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  /*!
   * escape-html
   * Copyright(c) 2012-2013 TJ Holowaychuk
   * Copyright(c) 2015 Andreas Lubbe
   * Copyright(c) 2015 Tiancheng "Timothy" Gu
   * MIT Licensed
   */
  
  'use strict';
  
  /**
   * Module variables.
   * @private
   */
  
  var matchHtmlRegExp = /["'&<>]/;
  
  /**
   * Module exports.
   * @public
   */
  
  module.exports = escapeHtml;
  
  /**
   * Escape special characters in the given string of html.
   *
   * @param  {string} string The string to escape for inserting into HTML
   * @return {string}
   * @public
   */
  
  function escapeHtml(string) {
    var str = '' + string;
    var match = matchHtmlRegExp.exec(str);
  
    if (!match) {
      return str;
    }
  
    var escape;
    var html = '';
    var index = 0;
    var lastIndex = 0;
  
    for (index = match.index; index < str.length; index++) {
      switch (str.charCodeAt(index)) {
        case 34: // "
          escape = '&quot;';
          break;
        case 38: // &
          escape = '&amp;';
          break;
        case 39: // '
          escape = '&#39;';
          break;
        case 60: // <
          escape = '&lt;';
          break;
        case 62: // >
          escape = '&gt;';
          break;
        default:
          continue;
      }
  
      if (lastIndex !== index) {
        html += str.substring(lastIndex, index);
      }
  
      lastIndex = index + 1;
      html += escape;
    }
  
    return lastIndex !== index
      ? html + str.substring(lastIndex, index)
      : html;
  }