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sure/app/components/DS/menu.html.erb
Guillem Arias Fauste 07a3413250 fix(ds): keep DS::Menu/Popover panels anchored across Turbo morphs (#2812)
* fix(ds): keep DS::Menu/Popover panels anchored across Turbo morphs

The app refreshes pages via Turbo morph (`turbo_refreshes_with method:
:morph`), and same-page account actions (disable, exclude, set-default,
etc.) trigger one. Two bugs in the shared floating-ui controllers surface
as a result:

- The panel's `position: fixed` only ever existed as a JS-applied inline
  style. Idiomorph resets every menu/popover's `style` attribute to match
  the server-rendered markup (which has none), silently stripping
  `position: fixed` from every panel on the page. The next dropdown/
  popover opened before floating-ui's async recompute lands briefly
  renders in normal flex flow, shoving its own trigger sideways and
  making computePosition anchor to that phantom position instead of the
  real button. Fix: make `position: fixed` part of the static markup so
  it can never be stripped.

- `this.show` was a plain instance property. Because the morph preserves
  the Stimulus controller in place (stable-id turbo frame), `this.show`
  doesn't reset when idiomorph re-closes the content element, so it can
  desync from the DOM and swallow the next click. Fix: derive `show` from
  the content element's own class instead of tracking it separately.

Reproduced and verified against the actual Turbo/Stimulus/floating-ui
pipeline in an isolated harness before and after the fix.

* test(ds): add regression coverage for menu/popover reopen-after-morph

Simulates what idiomorph does to an open panel on a same-page Turbo
morph — resets the content element's class back to the always-hidden
server-rendered markup and strips the JS-applied inline style, without
going through toggle()/close(). Verified against the pre-fix controllers
that this fails without the DOM-derived `show` getter.
2026-07-30 02:54:42 +02:00

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<%= tag.div data: { controller: "DS--menu", DS__menu_placement_value: placement, DS__menu_offset_value: offset, DS__menu_mobile_fullwidth_value: mobile_fullwidth, testid: testid } do %>
<% if icon_only? %>
<%= render DS::Button.new(variant: "icon", size: icon_button_size, icon: icon_vertical ? "more-vertical" : "more-horizontal", aria: { haspopup: "menu", expanded: "false", controls: menu_id }, data: { DS__menu_target: "button" }) %>
<% elsif variant == :button %>
<%= button %>
<% end %>
<div id="<%= menu_id %>" data-DS--menu-target="content" class="fixed px-2 lg:px-0 max-w-full hidden z-50" role="menu">
<%= tag.div class: "mx-auto min-w-[200px] shadow-border-lg bg-container rounded-lg", style: ("max-width: #{max_width}" if max_width) do %>
<%= tag.div class: class_names("py-1" => !no_padding, "overflow-y-auto" => max_height), style: ("max-height: #{max_height}" if max_height) do %>
<% items.each do |item| %>
<%= item %>
<% end %>
<% end %>
<% end %>
</div>
<% end %>