My version of bling.js, https://gist.github.com/paulirish/12fb951a8b893a454b32. ES6, a little bit encapsulated.

bling.js

let $ = document.querySelectorAll.bind(document);

Node.prototype.on = window.on = function(names, fn) {
	names.split(/\s/).forEach(function(name) {
		this.addEventListener(name, fn);
	}.bind(this));

	// Keep the chaining going
	return this;
};

HTMLCollection.prototype.__proto__ = Array.prototype;
NodeList.prototype.__proto__ = Array.prototype;

NodeList.prototype.on = NodeList.prototype.addEventListener = function(name, fn) {
	this.forEach(function(elem) {
		elem.on(name, fn);
	});

	// Keep the chaining going
	return this;
};

export default $;