Metody ciągów liczba liczby słów wewnątrz ciągu JavaScript

<html>
<body>
<script>
   function countWords(str) {
   str = str.replace(/(^\s*)|(\s*$)/gi,"");
   str = str.replace(/[ ]{2,}/gi," ");
   str = str.replace(/\n /,"\n");
   return str.split(' ').length;
   }
document.write(countWords("   Tutorix is one of the best E-learning   platforms"));
</script>
</body>
</html>
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