sure/app/components/DS/select.html.erb

<%# locals: form:, method:, collection:, options: {} %>

<div class="relative" data-controller="select <%= "list-filter" if searchable %> form-dropdown" data-select-menu-placement-value="<%= menu_placement %>" data-action="dropdown:select->form-dropdown#onSelect">
  <div class="form-field <%= options[:container_class] %>">
    <div class="form-field__body">
        <%= form.label method, options[:label], class: "form-field__label", id: "#{method}_label" if options[:label].present? %>
        <%= form.hidden_field method,
            value: @selected_value,
            data: {
              "form-dropdown-target": "input",
              "auto-submit-target": "auto",
              **(options.dig(:html_options, :data) || {})
            } %>
        <%# `aria-expanded` reflects MENU open/closed state — managed by the
            select controller's openMenu/close. Init as "false"; previously
            this incorrectly mirrored whether a value was selected.

            `aria-labelledby` points at BOTH the visible label and the
            trigger button itself so AT users hear "<label> <selected
            value>" — referencing only the label would override the
            button's text node and suppress the current value. %>
        <button type="button"
                id="<%= method %>_trigger"
                class="form-field__input w-full"
                data-select-target="button"
                data-action="click->select#toggle"
                aria-haspopup="listbox"
                aria-expanded="false"
                <%= "aria-labelledby=\"#{method}_label #{method}_trigger\"".html_safe if options[:label].present? %>>
          <%= selected_item&.dig(:label) || @placeholder %>
        </button>
    </div>
  </div>
  <div class="absolute z-50 p-1.5 w-full min-w-32 rounded-lg shadow-border-lg bg-container mt-1.5 transition duration-150 ease-out -translate-y-1 opacity-0 hidden" data-select-target="menu">
    <% if searchable %>
      <div class="flex items-center bg-container border border-secondary rounded-lg mb-1 focus-within:ring-4 focus-within:ring-alpha-black-200 theme-dark:focus-within:ring-alpha-white-300 transition-shadow">
        <%= render DS::SearchInput.new(
          variant: :embedded,
          placeholder: t("helpers.select.search_placeholder"),
          data: {
            list_filter_target: "input",
            action: "input->list-filter#filter input->select#syncTabindex"
          }
        ) %>
      </div>
    <% end %>
    <div data-list-filter-target="list" data-select-target="content" class="flex flex-col gap-0.5 max-h-64 overflow-auto"
          role="listbox" tabindex="-1">
      <% items.each do |item| %>
        <% is_selected = item[:value] == selected_value %>
        <% obj = item[:object] %>

        <%# Roving tabindex: selected option is in tab order (`0`); others
            are reachable only via ArrowUp/Down (`-1`). WAI-ARIA APG
            listbox keyboard pattern. %>
        <div class="filterable-item text-primary text-sm cursor-pointer flex items-center gap-2 px-3 py-2 rounded-lg hover:bg-container-inset-hover <%= "bg-container-inset" if is_selected %>"
              role="option"
              tabindex="<%= is_selected ? "0" : "-1" %>"
              aria-selected="<%= is_selected %>"
              data-select-target="option"
              data-action="click->select#select"
              data-value="<%= item[:value] %>"
              data-filter-name="<%= item[:label] %>">

          <span class="check-icon <%= "hidden" unless is_selected %>">
            <%= helpers.icon("check") %>
          </span>

          <% case variant %>
          <% when :simple %>
            <%= item[:label] %>

          <% when :logo %>
            <% unless item[:value].nil? %>
              <% if logo_for(item) %>
                <%= image_tag logo_for(item),
                      class: "w-6 h-6 rounded-full border border-secondary",
                      loading: "lazy" %>
              <% else %>
                <%= render DS::FilledIcon.new(
                      variant: :text,
                      text: item[:label],
                      size: "sm",
                      rounded: true
                    ) %>
              <% end %>
            <% end %>
            <%= item[:label] %>

          <% when :badge %>
            <% hex_color = color_for(item) %>
            <span class="flex items-center gap-2 text-sm font-medium rounded-full px-3 py-1 border truncate"
                  style="
                    background-color: color-mix(in oklab, <%= hex_color %> 10%, transparent);
                    border-color: color-mix(in oklab, <%= hex_color %> 20%, transparent);
                    color: <%= hex_color %>;">
              <% if icon_for(item) %>
                <%= helpers.icon icon_for(item), size: "sm", color: "current" %>
              <% else %>
                <span class="size-1.5 rounded-full" style="background-color: <%= hex_color %>;"></span>
              <% end %>
              <%= item[:label] %>
            </span>
          <% end %>
        </div>
      <% end %>
    </div>
  </div>
</div>