截断单词边界处的文本

Question

我想将字符限制转换为字数限制，因为它会在我的段落中的某些字词中途中断，但我不确定要添加/更改的内容。

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$(document).ready(function() {
  var nInitialCount = 180; //Intial characters to display
  var moretext = "Read more >";
  var lesstext = "Read less";
  $('.longtext').each(function() {
    var paraText = $(this).html();
    if (paraText.length > nInitialCount) {
      var sText = paraText.substr(0, nInitialCount);
      var eText = paraText.substr(nInitialCount, paraText.length - nInitialCount);
      var newHtml = sText + '<span class="moretext"><span>' + eText + '</span><a href="" class="links">' + moretext + '</a></span>';
      $(this).html(newHtml);
    }
  });

  $(".links").on('click', function(e) {
    var lnkHTML = $(this).html();
    if (lnkHTML == lesstext) {
      $(this).html(moretext);
    } else {
      $(this).html(lesstext);
    }
    $(this).prev().toggle();
    e.preventDefault();
  });
});

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<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="longtext">
  Text here<br>
  <br> Text here as well<br>
  <br> More Text here
</div>
<button class="links">Read less</button>

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任何帮助都将不胜感激。