owl-bt/src/client/app/tree/treeItemPalette/treeItemPaletteGroup.html

owl-bt is editor for Behavior trees. It has been inspired by Unreal engine behavior trees in a way, that it supports special node items like decorators and services. This makes trees smaller and much more readable.

<div>
  <div class="tree-item-palette-group_title" ng-click="showItems = !showItems">{{title}}
    <span class="fa tree-item-palette-group_state-icon" ng-class="{'fa-angle-up' : showItems, 'fa-angle-down' : !showItems}"></span>
  </div>
  <li ng-show="showItems">
    <ul class="tree-item-palette-group_items"></ul>
  </li>
</div>