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Selector optimization is less important than it used to be, as more browsers implement document.querySelectorAll() and the burden of selection shifts from jQuery to the browser. However, there are still some tips to keep in mind when selector performance becomes a bottleneck. link jQuery ExtensionsWhen possible, avoid selectors that include jQuery extensions. These extensions cannot take advantage

**Note:** This documentation refers to functionality made available in jQuery UI 1.11. As of jQuery UI 1.11, all of the library's source files support using AMD. This means that you can manage your jQuery UI dependencies without using Download Builder, and load jQuery UI's source files asynchronously using an AMD loader such as RequireJS. In this article we'll walk through the process of using AMD

Sometimes you want to make a piece of functionality available throughout your code. For example, perhaps you want a single method you can call on a jQuery selection that performs a series of operations on the selection. In this case, you may want to write a plugin. link How jQuery Works 101: jQuery Object MethodsBefore we write our own plugins, we must first understand a little about how jQuery wo

All jQuery UI plugins are designed to allow a developer to seamlessly integrate UI widgets into the look and feel of their site or application. Each plugin is styled with CSS and contains two layers of style information: standard jQuery UI CSS Framework styles and plugin-specific styles. The jQuery UI CSS Framework provides semantic presentation classes to indicate the role of an element within a

Learning Center Chat Twitter GitHub Copyright 2025 OpenJS Foundation and jQuery contributors. All rights reserved. See jQuery License for more information. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trad

Learning Center Chat Twitter GitHub Copyright 2025 OpenJS Foundation and jQuery contributors. All rights reserved. See jQuery License for more information. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trad

A jQuery plugin is simply a new method that we use to extend jQuery's prototype object. By extending the prototype object you enable all jQuery objects to inherit any methods that you add. As established, whenever you call jQuery() you're creating a new jQuery object, with all of jQuery's methods inherited. The idea of a plugin is to do something with a collection of elements. You could consider e

The jQuery library and virtually all of its plugins are contained within the jQuery namespace. As a general rule, global objects are stored inside the jQuery namespace as well, so you shouldn't get a clash between jQuery and any other library (like prototype.js, MooTools, or YUI). That said, there is one caveat: by default, jQuery uses $ as a shortcut for jQuery. Thus, if you are using another Jav

link jQuery: The BasicsThis is a basic tutorial, designed to help you get started using jQuery. If you don't have a test page setup yet, start by creating the following HTML page: