jQuery - Identifying an object by its position (index) among siblings

Question

What I'm trying to do is identify an element by its position within a div. I've tried the code below and it works, but I'm curious if there's a much more efficient way to do this.

HTML:

<div class="container">
  <button>One</button>
  <button>Two</button>
  <button>Three</button>
</div>

<div class="result"></div>

JavaScript:

$('.container button').on('click', function(e) {
  clickedBtn = e.target;
  btnNum = 0;

  $('.container button').each(function(i) {
    if ($(this)[0] === clickedBtn)
      btnNum = i+1;
  });

  $('.result').text('Clicked button #' + btnNum);
});

Answer 1

Since you are looking for index based in siblings you can call the .index() without any arguments.

 $('.container button').on('click', function(e) { $('.result').text('Clicked button #' + $(this).index()); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script> <div class="container"> <button>One</button> <button>Two</button> <button>Three</button> </div> <div class="result"></div>