binded.js

var app = {
  cache() {
    this.el = document.querySelector('#some-id');
    this.bindElement();
  },
  bindElement() {
    this.el.addEventListener('click', this.handleClick.bind(this));
  },
  handleClick(e) {
    alert('NO toques mis cosas!');
  },
  init() {
    this.cache();
  }
};

app.init();