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Today, I would like to share with you the relevant knowledge about the index method in jquery. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look at it.

There is an index method in jquery; this method is used to return the index position of the specified element relative to other specified elements, or to get the index position of the element relative to the selector, with the syntax of "$(selector). Index ()" or "$(selector) .index (element)".

The operating environment of this tutorial: windows10 system, jquery3.2.1 version, Dell G3 computer.

Is there an index method in jquery?

There is an index method in jquery

The index () method returns the index position of the specified element relative to other specified elements.

These elements can be specified through jQuery selectors or DOM elements.

Note: if no element is found, index () returns-1.

The first matching element is relative to the index of the sibling element.

Gets the index position of the first matching element relative to its sibling.

Grammar

(selector) .index ()

The index of the element relative to the selector.

Gets the index position of the element relative to the selector.

This element can be specified through the DOM element or the jQuery selector.

Grammar

$(selector) .index (element)

Examples are as follows:

$(document) .ready (function () {$("li") .click (function () {alert ($(this). Index ();});})

Click to get the index position of the list item, relative to its sibling element

CoffeeMilkSoda

Output result:

When you click milk, the result is:

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