Observer

obersver

$('div.src-accomRooms-container button.btnSelectRoom').on('click', function clickButonRoom(e){
  
})

MutationObserver = window.MutationObserver || window.WebKitMutationObserver
var observer = new MutationObserver(function(mutations, observer) {
    // fired when a mutation occurs
    console.info(mutations, observer);
    // Use of the information here.
});
observer.observe(document, {
  subtree: true,
  attributes: true
  //...
});

// select the target node
var target = document.querySelector('#priceTicketPanel.priceTicketPanel');

// create an observer instance
var observer = new MutationObserver(function(mutations, observer) {
  console.info(mutations)
  mutations.forEach(function(mutation) {
    console.log(mutation.target.childnodes[0].childnodes[3].childnodes[1].data);
  });
  console.info(observer)
});
 
// configuration of the observer:
var config = { attributes: true, childList: true, characterData: true };
 
// pass in the target node, as well as the observer options
observer.observe(target, config);
 
// later, you can stop observing
observer.disconnect();

$('div.priceTicket-priceDetailsBox.clearfix')