.index()

Find the index of the first item to match the selector.

Usage

$(collection).index(selector);

selector

A selector, HTML string, Node, array of Nodes, Dabby collection, or a callback function to filter the collection by.

Returns

The index of the matched selector, or -1 if the selector does not match.

Example

// Given the HTML:
// <ul>
//   <li>Item 1</li>
//   <li>Item 2</li>
//   <li id="item-3">Item 3</li>
//   <li>Item 4</li>
// </ul>

// Find the index of the element with the id 'item-3' within the list of all <li> elements
$("li").index("#item-3"); // => 2

Differences to jQuery

None.