jquery.com
jQuery.com is the official home of jQuery, a small JavaScript library that remains useful for older websites, simple interfaces, and projects that value broad browser support.
What is jQuery.com used for?
jQuery.com explains the library, provides downloads, links to documentation, and directs developers to support resources.
The library makes common browser tasks easier, including finding page elements, changing HTML, handling clicks, running animations, and sending Ajax requests.
Its famous $() function lets developers select elements with short code and then perform several actions on those elements.
The homepage demonstrates this idea with practical examples for page changes, event handling, and Ajax calls.
What is the latest version of jQuery?
The current release is jQuery 4.0.0, published on January 17, 2026.
This was the first major jQuery release in almost ten years and arrived twenty years after John Resig introduced the library in 2006.
Version 4 removes old code, retired features, undocumented behavior, and support for Internet Explorer versions older than IE 11.
It also improves support for modern security tools such as Trusted Types and Content Security Policy.
The release is important because it shows that jQuery is not a dead project, even though its role in web development has changed.
Why do developers still use jQuery?
jQuery offers one clear way to perform tasks that once behaved differently across browsers.
Modern JavaScript now provides tools such as querySelector, fetch, classList, and native promises, so new projects do not always need another library.
However, replacing working jQuery code can cost more time than it saves, especially inside large business systems, WordPress themes, store plugins, and older dashboards.
A small change written with jQuery can also be easier to understand than a complete move to React, Vue, or another application framework.
This makes jQuery most valuable as a stable tool for existing sites rather than the automatic base for every new website.
Is jQuery still supported?
Only the newest jQuery release receives full support, according to the official version support page.
The 4.x branch is current, while version 3.x receives only critical security fixes and important bug fixes.
Versions 1.x and 2.x are no longer supported.
This policy matters because many websites still load very old copies that may contain known security or compatibility problems.
Developers should check the exact version in their source code, browser tools, package file, or content management system before assuming their installation is safe.
How can developers download jQuery?
The official download page offers compressed production files, readable development files, source maps, and a smaller slim build.
The standard build is about 30 kilobytes after minification and gzip compression, according to the homepage.
The jQuery 4 slim build is about 19.5 kilobytes and leaves out Ajax, effects, Deferreds, and Callbacks.
Developers can also install the package with npm install jquery or load a fixed version from the official CDN.
A fixed version number is safer than an uncontrolled “latest” link because an unexpected major upgrade can break existing code.
How good is the jQuery documentation?
The official jQuery API documentation is the strongest part of the wider website network.
It organizes methods by jobs such as attributes, events, effects, manipulation, traversal, data, and Ajax.
Each method page normally explains its inputs, return value, version history, and common examples.
The main weakness is that the documentation assumes readers already understand basic HTML, CSS, and JavaScript.
New developers should begin with the linked Learning Center, then use the API site as a reference while writing real code.
Should an old website upgrade to jQuery 4?
Most maintained websites should plan an upgrade, but they should test first because jQuery 4 contains breaking changes.
The official team provides an upgrade guide and jQuery Migrate to identify removed features and restore some older behavior during the transition.
A safe process starts by updating to jQuery 3.7.1, fixing all Migrate warnings, checking plugins, and then testing version 4 in a staging environment.
Special care is needed for sites that depend on old plugins, custom event behavior, Deferred objects, or obsolete browsers.
The goal should be a clean upgrade, not leaving the Migrate plugin in production forever.
Is jQuery.com still worth visiting?
Yes, because it is the most reliable source for official downloads, supported versions, release notes, and API links.
Its visual design feels older than many modern developer sites, but the simple structure keeps important material easy to find.
The site also connects visitors to the public GitHub repository, contribution guides, community chat, and related projects such as jQuery UI and QUnit.
The best insight is that jQuery.com no longer needs to sell a new web trend.
Its real job is to protect a huge installed base while helping developers move old code toward safer and more modern standards.
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