/** * Polyfill for IE11 support. * new Event() is not supported by IE11. * Although `initEvent` is deprecated for modern browsers it is the one supported by IE */ if (typeof window.Event !== 'function') { window.Event = function Event(event, params) { const evt = document.createEvent('Event'); const evtParams = { bubbles: false, cancelable: false, ...params, }; evt.initEvent(event, evtParams.bubbles, evtParams.cancelable); return evt; }; window.Event.prototype = Event; }