Outline

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Tree

<ul class="go-Tree js-tree" role="tree">
  <li>
    <a href="#one">Level 1</a>
    <ul>
      <li>
        <a href="#two-one">Level 2-1</a>
      </li>
      <li>
        <a href="#two-two">Level 2-2</a>
        <ul>
          <li>
            <a href="#three-one">Level 3-1</a>
            <ul>
              <li>
                <a href="#four-one">Level 4-1</a>
              </li>
              <li>
                <a href="#four-two">Level 4-2</a>
              </li>
            </ul>
          </li>
        </ul>
      </li>
      <li>
        <a href="#two-three">Level 2-3</a>
        <ul>
          <li>
            <a href="#three-two">Level 3-2</a>
            <ul>
              <li>
                <a href="#four-three">Level 4-3</a>
              </li>
              <li>
                <a href="#four-four">Level 4-4</a>
              </li>
            </ul>
          </li>
        </ul>
      </li>
    </ul>
  </li>
</ul>

Select

<div class="js-select"></div>