This is a simple and small (6k minified, 1.7k gzip + 0.9k css) vanilla javascript library to create dropdowns and context-menus and manages nested menus in a sane manner.
It supports every evergreen browser without transpiling anything other than the
module exports. It also works with IE11/10 with babel and a polyfill for
NodeList.prototype.forEach. The simplest working polyfill for
NodeList.prototype.forEach is NodeList.prototype.forEach = Array.prototype.forEach. If you need IE9 support you also need to add a
polyfill for the classList property of DOMElement. I have had success using
classList.js.