text: 'use strict';
  
  const internals = {};
  
  
  module.exports = function (input) {
  
      if (!input) {
          return '';
      }
  
      const lessThan = 0x3C;
      const greaterThan = 0x3E;
      const andSymbol = 0x26;
      const lineSeperator = 0x2028;
  
      // replace method
      let charCode;
      return input.replace(/[<>&\u2028\u2029]/g, (match) => {
  
          charCode = match.charCodeAt(0);
  
          if (charCode === lessThan) {
              return '\\u003c';
          }
  
          if (charCode === greaterThan) {
              return '\\u003e';
          }
  
          if (charCode === andSymbol) {
              return '\\u0026';
          }
  
          if (charCode === lineSeperator) {
              return '\\u2028';
          }
  
          return '\\u2029';
      });
  };
  