code: function(node) {
      return node.nodeType === this.TEXT_NODE || this.PHRASING_ELEMS.indexOf(node.tagName) !== -1 ||
        ((node.tagName === "A" || node.tagName === "DEL" || node.tagName === "INS") &&
          this._everyNode(node.childNodes, this._isPhrasingContent));
    }
docs: *
  Determine if a node qualifies as phrasing content.
  https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Phrasing_content