Events

Callback	DOM event	When
onInit	layermenu:init	Instance created.
onChange	layermenu:change	A transition starts (level already updated).
onComplete	layermenu:complete	A transition ends.
onDestroy	layermenu:destroy	Instance destroyed.

{
  instance, level, path, panel,
  direction,  // 'forward' | 'back'      (change / complete)
  from, to,   // <ul> elements            (change / complete)
  trigger,    // the submenu's trigger link
}

document.addEventListener('layermenu:change', (e) => {
  breadcrumbs.textContent = ['Menu', ...e.detail.path].join(' / ');
});