js observer

observe-element.js

function observeElement(el) {

	// select the target node
	var target = document.querySelector(el);

	// create an observer instance
	var observer = new MutationObserver(function(mutations) {
		console.log('mutação detectada');
	});

	// configuration of the observer:
	var configObserver = { attributes: true, childList: true, characterData: true };

	// pass in the target node, as well as the observer options
	observer.observe(target, configObserver);
}