Creates a custom event

customEvent.js

function setCustomEvent (dispatcher, eventName, dataObj) {
    let event
    if (window.CustomEvent) {
        event = new CustomEvent(eventName, { detail: dataObj })
    } else {
        event = document.createEvent('CustomEvent')
        event.initCustomEvent(eventName, true, true, dataObj)
    }

    return dispatcher.dispatchEvent(event)
}