Vanilla JS jQuery.parents() realisation (npm module: https://github.com/ziggi/dom-parents)

parents.js

Element.prototype.parents = function(selector) {
	var elements = [];
	var elem = this;
	var ishaveselector = selector !== undefined;
 
	while ((elem = elem.parentElement) !== null) {
		if (elem.nodeType !== Node.ELEMENT_NODE) {
			continue;
		}
 
		if (!ishaveselector || elem.matches(selector)) {
			elements.push(elem);
		}
	}
 
	return elements;
};

Superb!!! Thanks @ziggi

@LuisSevillano, check it out: https://github.com/ziggi/dom-parents