emit() function for custom events

emit.lib.js

/**
 * Based on Chris Ferdinandis emit() function as shown in his great newsletter.
 * See also https://gomakethings.com/a-vanilla-js-custom-event-helper-function/
 * Emit a custom event
 * @param  {String} type   The event type
 * @param  {any}      detail Any details to pass along with the event
 * @param  {Node}   elem   The element to emit the event on
 */
function emit (type, detail, elem = document) {

	// Create a new event
	let event = new CustomEvent(type, {
		bubbles: true,
		cancelable: true,
		detail: detail
	});

	// Dispatch the event
	return elem.dispatchEvent(event);

}