JS console challenge : find the longest word

find_longest_word.js

function LongestWord(sen) { 
  
  sen = sen.split(' '); // creates array 
  var nonAlpha = new RegExp('[^a-zA-Z\d\s:]'); 
  
  var filtered = sen.filter(function(item){
    return !nonAlpha.test(item);
  });
  
  var sorted = filtered.sort(function(n1,n2){
    return n2.length - n1.length ;
  });
 return sorted[0]; 
         
}
   
console.log(LongestWord("tested th$ l00ngest word !!!!!!!!!!!!"));