JS: Where to bind event handlers in constructor functions?

Question

JavaScript

Where in the code should you add event handlers?
Directly in the constructor itself:

var Func = function (el) {
  this.button = document.querySelector(el);
  this.button.addEventListener('click', someFunction);
};

Or is it worth creating separate methods for binding events?

var Func = function (el) {
  this.button = document.querySelector(el);
};

Func.prototype.init = function () {
  this.button.addEventListener('click', someFunction);
  this.anotherElement.addEventListener('change', anotherFunction);
};

Answer 1

I take out module initiation always in a separate function, which suspends event handlers. So the same type of actions are taken out in a separate function, it turns out more beautiful.