_on (chaining, data-*event, function coupling)

_on.js

EventTarget.prototype._on = (function(){
	const _on = EventTarget.prototype.addEventListener;
	return function(events, listener, capture, control) {
		var _this = this;
		var assign_data_event = function(dv){
			for (var x = 0; x < dv.length; x++) {
				var fname = dv[x];
				var itms = document.querySelectorAll(`[${k}=${fname}]`);
				var evt = k.split('-')[1];
				for (var y = 0; y < itms.length; y++) {
					itms[y].addEventListener(evt,function(e){
						var e_data = e.currentTarget.getAttribute('data-'+evt)
						var fn = control[e_data];
						fn(itms[y], fname, e)
						listener(e)
					},capture);
				}
			}
		}
		if (typeof events === 'object' && events !== null) {
			var dataEvent = events;
			if ( dataEvent ) {
				for (var k in dataEvent){
					var e_s = k.split(" ");
					if (e_s.length > 0) {
						e_s.forEach(function(evt){
							var dv = dataEvent[k];
							assign_data_event(dv)
						});
					} else {
						assign_data_event(k)
					}
				}
			}
		} else {
			var e_s = events.split(" ");
			var that = this;
			// multiple events
			if (e_s.length > 0) {
				e_s.forEach(function(evt){
					that.addEventListener(evt,function(e){
						listener(e)
					},capture);
				});
			}
		}
		// chaining
		_on.apply(_this, arguments);
		return _this;
	};
})();

controller_forgot.js

function controller_forgot(){
	this.show_forgot_dialogue = function( target, destination, action, e ){
		//
	}
}

// or
/*
class controller_forgot(){
        constructor(){
	        // might need to bind 
		this.show_forgot_dialogue = this.show_forgot_dialogue.bind(this)
	}
	show_forgot_dialogue( target, destination, action, e ){
		//
	}
}
*/

var _CON_forgot = new controller_forgot();

window._on('load', function (e) {

})._on({ 
	'data-click'/*, ...*/: ['show_forgot_dialogue'/*, ...*/]}, function (e) {
	console.log(e.target)
}, false, _CON_forgot );

index.html

<div data-click="show_forgot_dialogue">DIALOGUE</div>

We used to have a function that dealt with the data-*events and the overhead of jQuery to deal with the on events. Well now we removed jQuery and _on works upon vanilla addEventListener.