Get index of clicked element in collection with jQuery

How do I get the index of clicked item in the code below?

$('selector').click(function (event) {
    // get index in collection of the clicked item ...
});

With Firebug I saw this: jQuery151017197709735298827: 2 (I've clicked in the second element).

This will alert the index of the clicked selector (starting with 0 for the first):

$('selector').click(function(){
    alert( $('selector').index(this) );
});

$('selector').click(function (event) {
    alert($(this).index());
});

jsfiddle

Siblings

$(this).index() can be used to get the index of the clicked element if the elements are siblings.

<div id="container">
    <a href="#" class="link">1</a>
    <a href="#" class="link">2</a>
    <a href="#" class="link">3</a>
    <a href="#" class="link">4</a>
</div>

$('#container').on('click', 'a', function() {
  console.log($(this).index());
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<div id="container">
  <a href="#" class="link">1</a>
  <a href="#" class="link">2</a>
  <a href="#" class="link">3</a>
  <a href="#" class="link">4</a>
</div>

---

Not siblings

> If no argument is passed to the .index() method, the return value is an integer indicating the position of the first element within the jQuery object relative to its sibling elements.

Pass the selector to the index(selector).

$(this).index(selector);

Example:

Find the index of the <a> element that is clicked.

<tr>
    <td><a href="#" class="adwa">0001</a></td>
</tr>
<tr>
    <td><a href="#" class="adwa">0002</a></td>
</tr>
<tr>
    <td><a href="#" class="adwa">0003</a></td>
</tr>
<tr>
    <td><a href="#" class="adwa">0004</a></td>
</tr>

Fiddle

$('#table').on('click', '.adwa', function() {
    console.log($(this).index(".adwa"));
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<table id="table">
    <thead>
        <tr>
            <th>vendor id</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td><a href="#" class="adwa">0001</a></td>
        </tr>
        <tr>
            <td><a href="#" class="adwa">0002</a></td>
        </tr>
        <tr>
            <td><a href="#" class="adwa">0003</a></td>
        </tr>
        <tr>
            <td><a href="#" class="adwa">0004</a></td>
        </tr>
    </tbody>
</table>

Just do this way:-

$('ul li').on('click', function(e) {
    alert($(this).index()); 
});

OR

$('ul li').click(function() {
    alert($(this).index());
});

check this out https://forum.jquery.com/topic/get-index-of-same-class-element-on-click then http://jsfiddle.net/me2loveit2/d6rFM/2/

var index = $('selector').index(this);
console.log(index)

if you are using .bind(this), try this:

let index = Array.from(evt.target.parentElement.children).indexOf(evt.target);

$(this.pagination).find("a").on('click', function(evt) {
        let index = Array.from(evt.target.parentElement.children).indexOf(evt.target);

        this.goTo(index);
    }.bind(this))