code: function text(txt) {
    if(!this.length) {
      return this;
    }
    if(txt === undefined) {
      return this.dom[0].textContent;
    }
    txt = txt || '';
    this.each(function(el) {
      el.textContent = txt;
    });
    return this;
  }
docs: IE9 supports textContent and innerText has various issues.
  
  See: https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent
  See: http://www.kellegous.com/j/2013/02/27/innertext-vs-textcontent/