truncate.js

$(function() {
  var len = 100;
  var p = $("[data-id='truncate']");
  if (p) {

    var trunc = p.html();
    if (trunc.length > len) {

      trunc = trunc.substring(0, len);
      trunc = trunc.replace(/\w+$/, '');

      trunc += '<a href="#" ' +
        'onclick="this.parentNode.innerHTML=' +
        'unescape(\''+escape(p.html())+'\');return false;">' +
        '...<\/a>';
      p.html(trunc);
    }
  }
})