Function handleKeyDown

web/components/a11y/FocusTrap.tsx:40–59

(e: KeyboardEvent)

      );

    const handleKeyDown = (e: KeyboardEvent) => {
      if (e.key !== "Tab") return;
      const els = focusable();
      if (els.length === 0) return;

      const first = els[0];
      const last = els[els.length - 1];

      if (e.shiftKey) {
        if (document.activeElement === first) {
          e.preventDefault();
          last.focus();
        }
      } else {
        if (document.activeElement === last) {
          e.preventDefault();
          first.focus();
        }
      }
    };

    // Move focus into the trap on mount
    const els = focusable();