code: function select(selector, context, fn) {
      var nodes;
      
      if (arguments.length === 2 && typeof context === "function") {
          fn = context;
          context = undefined;
      }
      
      nodes = (context || document).querySelectorAll(selector);
      nodes = Array.prototype.slice.call(nodes);
      
      if (fn) nodes.forEach(fn);
      else return nodes;
  }
docs: Return selected elements or iterate and apply a function.
  @param {string} selector
  @param {Document|Element} [context]
  @param {function} [fn]
  @returns {Node[]}