Methods

const menu = new LayerMenu('.menu', options);

menu.open('#submenu-id');     // open a submenu and every level above it
menu.open(liOrLinkElement);   // also accepts the <li>, its trigger link or the <ul>
menu.open(target, { animate: false });
menu.back();                  // one level up
menu.reset();                 // back to the root
menu.update({ animation: 'flip', backText: '← {parent}' });
menu.destroy();               // restore the original markup

menu.level;        // 0 = root
menu.path;         // ['Shop', 'Women']
menu.panel;        // the visible <ul>
menu.isAnimating;

LayerMenu.init(selector?, options?);  // → instances[]
LayerMenu.get(elementOrSelector);     // → instance | null
LayerMenu.animations;                 // presets, extendable

Clicking quickly never breaks the menu: a new step finishes the running transition first. Creating a second instance on the same element destroys the first one.