警告ダイアログ

<%# Markup for the alert-dialog demo.
    role="alertdialog" conveys urgency and interrupts until an explicit confirm/cancel
    response is given. Unlike a plain dialog it does not close on a backdrop click.
    The library handles focus move, focus trap, Esc (cancel), background scroll lock,
    background inert, returning focus to the trigger, and firing confirm / cancel
    events. Styling lives in demo.css. %>
<div class="alert-dialog" data-controller="stimeo--alert-dialog">
  <button
    type="button"
    class="alert-dialog__trigger"
    data-stimeo--alert-dialog-target="trigger"
    data-action="click->stimeo--alert-dialog#open">
    <%= t("components.alert_dialog.demo.open_button") %>
  </button>

  <%# A live region that announces the latest response; demo.js reflects confirm / cancel.
      For bilingual support the copy is resolved with I18n server-side and passed via
      data-* attributes, which demo.js only reads (never hardcoded in JS). %>
  <p
    class="alert-dialog__status"
    role="status"
    data-alert-dialog-status
    data-confirm-message="<%= t("components.alert_dialog.demo.confirmed_message") %>"
    data-cancel-message-user="<%= t(
      "components.alert_dialog.demo.cancelled_message",
      reason: t("components.alert_dialog.demo.cancel_reason_user")
    ) %>"
    data-cancel-message-escape="<%= t(
      "components.alert_dialog.demo.cancelled_message",
      reason: t("components.alert_dialog.demo.cancel_reason_escape")
    ) %>"
    hidden></p>

  <%# The role="alertdialog" + aria-modal region. Starts hidden (closed).
       aria-labelledby points to the title, aria-describedby to the body message. %>
  <div
    class="alert-dialog__backdrop"
    role="alertdialog"
    aria-modal="true"
    aria-labelledby="alert-dialog-title"
    aria-describedby="alert-dialog-desc"
    data-stimeo--alert-dialog-target="dialog"
    hidden>
    <div class="alert-dialog__panel">
      <h3 id="alert-dialog-title" class="alert-dialog__title">
        <%= t("components.alert_dialog.demo.confirm_title") %>
      </h3>
      <p id="alert-dialog-desc"><%= t("components.alert_dialog.demo.confirm_desc") %></p>
      <div class="alert-dialog__actions">
        <%# Default focus goes to the least-destructive action: Cancel. %>
        <button
          type="button"
          data-stimeo--alert-dialog-target="initialFocus"
          data-action="click->stimeo--alert-dialog#cancel">
          <%= t("components.alert_dialog.demo.cancel") %>
        </button>
        <button
          type="button"
          class="alert-dialog__danger"
          data-action="click->stimeo--alert-dialog#confirm">
          <%= t("components.alert_dialog.demo.confirm") %>
        </button>
      </div>
    </div>
  </div>
</div>

/*
 * Presentation-only styles for the alert-dialog demo.
 * Stimeo UI itself ships behavior only (no CSS), so the styling lives here.
 * Open/close is the library toggling the dialog element's hidden attribute.
 */

.alert-dialog__trigger,
.alert-dialog__danger {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  cursor: pointer;
  border: 1px solid var(--border-interactive);
  border-radius: 0.375rem;
  background: var(--surface-card);
}

/* The confirm button is a destructive action, so show it in a warning color (visual only). */
.alert-dialog__danger {
  border-color: var(--danger-700);
  background: var(--danger-700);
  color: var(--white);
}

.alert-dialog__status {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.alert-dialog__status[hidden] {
  display: none;
}

/* Use the role="alertdialog" region as a centered backdrop. */
.alert-dialog__backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgb(0 0 0 / 0.5);
  z-index: 50;
}

/* Setting display explicitly overrides the hidden attribute's default display:none, so
   re-declare display:none while closed to honor the library's hidden control. */
.alert-dialog__backdrop[hidden] {
  display: none;
}

.alert-dialog__panel {
  width: min(28rem, 100%);
  padding: 1.5rem;
  background: var(--surface-card);
  border-radius: 0.5rem;
  box-shadow: 0 20px 50px rgb(15 23 42 / 0.25);
}

.alert-dialog__title {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
}

.alert-dialog__actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.alert-dialog__actions button {
  padding: 0.5rem 1rem;
  font: inherit;
  cursor: pointer;
  border-radius: 0.375rem;
  border: 1px solid var(--border-strong);
  background: var(--surface-card);
}

.alert-dialog__actions .alert-dialog__danger {
  border-color: var(--danger-700);
  background: var(--danger-700);
  color: var(--white);
}

// Consumer-side JS for the alert-dialog demo (optional).
// The library fires stimeo--alert-dialog:confirm on confirm and
// stimeo--alert-dialog:cancel (with detail { reason: "user" | "escape" }) on
// cancel. The consumer subscribes to decide "what to do on confirm". Here we only
// reflect the latest response in the status live region (the real work is the
// subscriber's responsibility — this is just an example).
// For bilingual support the copy is resolved server-side via I18n and read from the
// status element's data-* attributes (never hardcoded in JS).
document.addEventListener("stimeo--alert-dialog:confirm", () => {
  const status = document.querySelector("[data-alert-dialog-status]");
  if (status) showStatus(status.dataset.confirmMessage);
});

document.addEventListener("stimeo--alert-dialog:cancel", (event) => {
  const status = document.querySelector("[data-alert-dialog-status]");
  if (!status) return;
  // reason is "escape" (cancelled with the Esc key) or "user" (the Cancel button).
  const message =
    event.detail.reason === "escape"
      ? status.dataset.cancelMessageEscape
      : status.dataset.cancelMessageUser;
  showStatus(message);
});

// Show the latest response message in the status element.
function showStatus(message) {
  const status = document.querySelector("[data-alert-dialog-status]");
  if (!status) return;
  status.textContent = message;
  status.hidden = false;
}