code: function textContent(el, text) {
    if (typeof el.textContent === 'undefined') {
      el.innerText = text;
    } else {
      el.textContent = text;
    }
  }
docs: Injects text into an element, replacing any existing contents entirely.
  
  @param  {Element} el
  @param  {String} text
  @return {Element}
  @function textContent