<!-- Sidenav -->

<nav

  id="sidenav-1"

  class="sidenav"

  data-mdb-hidden="false"

>

  <ul class="sidenav-menu">

    <li class="sidenav-item">

      <a class="sidenav-link">

        <i class="far fa-smile fa-fw me-3"></i><span>Link 1</span></a

      >

    </li>

    <li class="sidenav-item">

      <a class="sidenav-link"

        ><i class="fas fa-grin fa-fw me-3"></i><span>Category 1</span></a

      >

      <ul class="sidenav-collapse show">

        <li class="sidenav-item">

          <div class="treeview">

  <ul>

    <li>One</li>

    <li>Two</li>

    <li>

      <a>Three</a>

      <ul class="show">

        <li>Second-one</li>

        <li>Second-two</li>

        <li>

          <a>Second-three</a>

          <ul>

            <li>

              <a>Third-one</a>

              <ul>

                <li>Fourth-one</li>

                <li>Fourth-two</li>

                <li>Fourth-three</li>

              </ul>

            </li>

            <li>Third-two</li>

            <li>

              <a>Third-three</a>

              <ul>

                <li>Fourth-one</li>

                <li>Fourth-two</li>

                <li>Fourth-three</li>

              </ul>

            </li>

          </ul>

        </li>

      </ul>

    </li>

  </ul>

</div>

        </li>

        <li class="sidenav-item">

          <a class="sidenav-link">Link 3</a>

        </li>

      </ul>

    </li>

    <li class="sidenav-item">

      <a class="sidenav-link"

        ><i class="fas fa-grin-wink fa-fw me-3"></i><span>Category 2</span></a

      >

      <ul class="sidenav-collapse">

        <li class="sidenav-item">

          <a class="sidenav-link">Link 4</a>

        </li>

        <li class="sidenav-item">

          <a class="sidenav-link"

            >Link 5</a

          >

        </li>

      </ul>

    </li>

  </ul>

</nav>

<!-- Sidenav -->

​

<!-- Toggler -->

<button

  data-mdb-toggle="sidenav"

  data-mdb-target="#sidenav-1"

  class="btn btn-primary"

  aria-controls="#sidenav-1"

  aria-haspopup="true"

>

  <i class="fas fa-bars"></i>

</button>

<!-- Toggler -->