zdoc/layouts/partials/drawer/drawer.html

<div id="myDrawer" class="drawer" style="{{ if eq ($.Param "languagedir") "rtl" }}right: -100%{{ end }}">
  <div class="drawer__header">
    <div class="drawer__header--text">
      {{ .Site.Params.logoText }}
    </div>
    <div class="grow"></div>
    <div class="drawer__close">
      {{ partial "svgs/close.svg" (dict "width" 22 "height" 22) }}
    </div>
  </div>

  <div class="drawer__body">
    {{ partial "main/sections/list-menu.html" . }}
  </div>
</div>
<div id="myModal" class="modal" style="{{ if eq ($.Param "languagedir") "rtl" }}opacity: 0; right: -100%{{ end }}"></div>

<script>
  var isDrawerOpen = localStorage.getItem('isDrawerOpen');
  var modal = document.getElementById("myModal");
  var drawer = document.getElementById('myDrawer');
  
  {{ $languagedir := ($.Param "languagedir" | default "ltr") }}
  var languagedir = JSON.parse({{ $languagedir | jsonify }});

  var openDrawer = function () {
    modal.style.opacity = 1;
    
    if (languagedir === "rtl") {
      modal.style.right = 0;
      drawer.style.right = 0;
    } else {
      modal.style.left = 0;
      drawer.style.left = 0;
    }
  }

  if (isDrawerOpen && isDrawerOpen === 'true') {
    openDrawer();
  }
</script>