It would be nice to make this less nodeName centric and more reusable:

```js
toggleDisplay: function thui_toggle(opts) {
  var elems = this.container.querySelectorAll(opts.selector);
  var length = elems.length;
  for (var i = 0; i < length; i++) {
    if (opts.isEnabled) {
      progress[i].classList.remove('hide');
    } else {
      progress[i].classList.add('hide');
    }
  }
}
```