Maximum words in textarea

Maximum words

<textarea maxlength ="number" id="textarea">
<span id="txt-length-left1" style="color:red"></span>

<script>

    $(document).ready(function(){

       var maxchars = 25;
          $('body').on('keyup paste', '#textarea', function () {
          $(this).val($(this).val().substring(0, maxchars));
          var tlength = $(this).val().length;
          remain = maxchars - parseInt(tlength);
          $('#txt-length-left2').text(remain);
       });

    });

</script>