Semantic Coherence: jQuery – Signal Evidence & AI Readability

[H2] jQuery

Download jQuery
v4.0.0

Only the latest version of jQuery is supported.
Discover Support Options
View Source on GitHub →
How jQuery Works →

[H3] Lightweight Footprint
Only 30kB minified and gzipped. Can also be included as an AMD module

[H3] CSS3 Compliant
Supports CSS3 selectors to find elements as well as in style property manipulation

[H3] Cross-Browser
Chrome, Edge, Firefox, IE, Safari, Android, iOS, and more

[H2] What is jQuery?
jQuery is a fast, small, and feature-rich JavaScript library. It makes
things like HTML document traversal and manipulation, event handling,
animation, and Ajax much simpler with an easy-to-use API that works across
a multitude of browsers. With a combination of versatility and
extensibility, jQuery has changed the way that millions of people write
JavaScript.

[H2] A Brief Look
[H3] DOM Traversal and Manipulation
Get the <button> element with the class 'continue' and change its HTML to 'Next Step...'

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$( "button.continue" ).html( "Next Step..." )

[H3] Event Handling
Show the #banner-message element that is hidden with
display:none in its CSS when any button in #button-container is
clicked.

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var hiddenBox = $( "#banner-message" );$( "#button-container button" ).on( "click",

[H2] jQuery

[H1] jQuery Support

[H2] link Supported versions
We support only the latest version of jQuery. The 1.x and 2.x branches are no longer supported.
jQuery 3.x will only receive critical security patches and bug fixes. We encourage all users to upgrade to the latest version of jQuery 4.x.
jQuery 4.x is the current version branch of jQuery.
[H3] link Unsupported versions
When using a version earlier than the latest version, there are a few options:
Upgrade to the latest version of jQuery. The best solution is to upgrade as it will include all features, bug fixes, security patches, and improvements. The jQuery Migrate Plugin and upgrade guides are available to assist with upgrading.
Continue using an older version of jQuery, but include all security patches through commercial security support.
Continue using an older version of jQuery without security patches. However, this can come with multiple risks.
[H2] link Community support
The following learning resources are available online and free of charge:
jQuery Learning Center
jQuery API Documentation
jQuery UI Demos
jQuery UI API Documentation
[H3] link Matrix chat
jQuery is on Matrix! The support channel for jQuery is #jquery_jquery:gitter.im. You can read the channel on Element without an account, or join the channel via any Matrix client.
We use the public #jquery_dev channel to discuss project developments. We also hold weekly meetings on Matrix.
[H3] link IRC chat
We are on Libera Chat IRC in the #jquery channel where you can ask for support. You can join via webchat, or via any IRC client.
[H3] link StackOverflow
StackOverflow is a great place to ask questions and find support for all jQuery projects. Search or create questions tagged with "jquery", or refer to the "jquery" tag introduction.
[H2] link Commercial support
The following companies offer commercial support services for jQuery.
HeroDevs offers security and compatibility support for EOL versions of jQuery through the OpenJS Ecosystem Sustainability Program and is an approved commercial support vendor. Find out more about their Never Ending Support options.
[H2] link Follow us
jQuery on Mastodon and the Fediverse:
@jquery@social.lfx.dev
@qunit@fosstodon.org
@openjsf@social.lfx.dev
jQuery on Twitter:
@jquery
@jqueryui
@jquerymobile
@qunitjs
@jqcon
[H2] link Media & Press inquiry
Journalists seeking information on jQuery should contact: info@jquery.com.
For guidance on branding and trademark usage, visit https://brand.jquery.org/.
[H2] link Found a bug?
For reporting bugs in libraries, documentation, or content, the project's GitHub issue tracker should be used. All jQuery projects can be found at https://github.com/jquery
Still haven't found what you're looking for? Please feel free to contact: info@jquery.com
[H2] link Archives
Freenode IRC chat channels (2011-2021)
jQuery Forum (2010-2021): For questions and advice regarding jQuery Core, jQuery UI, Themeroller, QUnit, development of jQuery Plugins, and more.
jQuery Accessibility mailing list (2008-2016).

[H2] jQuery

[H1] Download jQuery

[H2] link Latest version
To locally download these files, right-click the link and select "Save as..." from the menu.
Download the compressed, production version:
Download jQuery 4.0.0
Download the uncompressed development version of jQuery 4.0.0
Download the map file for jQuery 4.0.0
jQuery 4.0.0 blog post with release notes
The slim build is a smaller version, that excludes the ajax and effects modules:
Download jQuery 4.0.0 slim build
Download the uncompressed development version of the jQuery 4.0.0 slim build
Download the map for the jQuery 4.0.0 slim build
The uncompressed version is best used during development or debugging; the compressed file saves bandwidth and improves performance in production. You can download the source map file to help with debugging the compressed production version. The source map is not required for end-users to run jQuery; it is a tool to help improve a developer's debugging experience. As of jQuery 1.11/2.1, we no longer link source maps to compressed releases by default.
Browse the jQuery CDN at releases.jquery.com for a full list of assets, including older and historical versions.
[H3] link Upgrade
For help when upgrading jQuery, read the upgrade guides.
We also recommend using the jQuery Migrate plugin.
[H3] link jQuery Migrate Plugin
The jQuery Migrate plugin simplifies upgrading from older versions of jQuery. The plugin restores deprecated features and behaviors so that older code will still run properly on newer versions of jQuery.
When upgrading from a pre-1.9 jQuery version to jQuery 1.9 or up to jQuery 3.0, first use jQuery Migrate 1.x:
Download jQuery Migrate 1.4.1 (compressed production version)
Download the uncompressed, development jQuery Migrate 1.4.1
When migrating from jQuery 3.x to a later jQuery 3.x version, use jQuery Migrate 3.x instead:
Download jQuery Migrate 3.6.0 (compressed production version)
Download the uncompressed, development jQuery Migrate 3.6.0
Use the compressed production version to restore compatibility issues without changing any application code.
Use the uncompressed development version to additionally diagnose and help migrate compatibility issues, through helpful warnings on the console that identify how to transition your application code.
[H2] link Downloading jQuery using npm or Yarn
jQuery is published on npm under the jquery package. You can install the latest version of jQuery with the npm CLI:

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npm install jquery

As an alternative you can use the Yarn CLI:

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yarn add jquery

This will install jQuery in the node_modules directory. Within node_modules/jquery/dist/ you will find an uncompressed release, a compressed release, and a map file.
[H2] link jQuery Pre-Release Builds
The jQuery team is constantly working to improve the code. Each commit to the Github repo generates a work-in-progress version of the code that we update on the jQuery CDN. We recommend they be used to determine whether a bug has already been fixed when reporting bugs against released versions, or to see if new bugs have been introduced.
These versions are sometimes unstable and never suitable for production sites.
Browse Git builds of jQuery
[H2] link jQuery CDN
To use the jQuery CDN, reference the file in the script tag directly from the jQuery CDN domain. You can get the complete script tag, including Subresource Integrity attribute, by visiting https://releases.jquery.com and clicking on the version of the file that you want to use. Copy and paste that tag into your HTML file.
The jQuery CDN supports Subresource Integrity (SRI) (specification) which allows the browser to verify that the files being delivered have not been modified. Adding the new integrity attribute will ensure your application gains this security improvement in supporting browsers.
Starting with jQuery 1.9, sourcemap files are available on the jQuery CDN. However, as of version 1.10.0/2.1.0 the compressed jQuery no longer includes the sourcemap comment in CDN copies because it requires the uncompressed file and sourcemap file to be placed at the same location as the compressed file. If you are maintaining local copies and can control the locations all three files, you can add the sourcemap comment to the compressed file for easier debugging.
To see all available files and versions, including older and historical versions, visit https://releases.jquery.com
[H3] link Other CDNs
The following CDNs also host compressed and uncompressed versions of jQuery releases. Starting with jQuery 1.9 they may also host sourcemap files; check the site's documentation.
Note that there may be delays between a jQuery release and its availability there. Please be patient, they receive the files at the same time the blog post is made public. Beta and release candidates are not hosted by these CDNs.
Google CDN
Microsoft CDN
CDNJS CDN
jsDelivr CDN
[H2] link About the Code
jQuery is provided under the MIT license.
The code is hosted and developed in the jQuery GitHub repository. If you've spotted some areas of code that could be improved, feel free to report a bug. If you'd like to participate in developing jQuery, peruse our contributor site for more information.
Feedback about a jQuery plugin should be directed to the plugin author, not the jQuery team.
[H2] link Past Releases
All past releases can be found on the jQuery CDN.

[H2] jQuery

[H1] Browser Support

[H2] link Current Active Support
[H3] link Desktop
Chrome: (Current - 1) and Current
Edge: (Current - 1) and Current[1], IE mode[2]
Firefox: (Current - 1) and Current, ESR[3]
Internet Explorer: 11[2]
Safari: (Current - 1) and Current
Opera: Current
[H3] link Mobile
Chrome on Android: (Current - 1) and Current
Safari on iOS: (Current - 2), (Current - 1) and Current
Any problem with jQuery in the above browsers should be reported as a bug in jQuery.
Current denotes that we support the current stable version of the browser, (Current - 1) - that the version that preceded it is supported. For example, if we support (Current - 2), (Current - 1) and Current versions of a particular browser & the current version of a browser is 24.x, we support the 24.x, 23.x and 22.x versions.
If you need to support Edge Legacy, Internet Explorer 9-10, iOS 7+ (and not just 3 latest versions) or Android Browser in Android 4.0+, use jQuery 3.x.
If, additionally, you need to support Internet Explorer 6-8, Opera 12.1x or Safari 5.1+, use jQuery 1.x.
[1] Only the Chromium-based Edge is supported, Edge Legacy & the old EdgeHTML-based version – is not.
[2] We support both the real Internet Explorer 11 and Edge in IE mode, but only in standards mode and in the IE 11 document mode. Read more about IE mode in Edge.
[3] Firefox ESR (Extended Support Release) is a Firefox version for use by organizations including schools, universities, businesses and others who need extended support for mass deployments. It is based on a regular release of Firefox and synced from the next regular Firefox every few releases - example ESR versions include Firefox 102, 115 & 128. At any given time there are at most two ESR versions available; jQuery supports all of them. See the Mozilla site for organizations for more information.
[H2] link Unsupported Browsers
While jQuery might run without major issues in older browser versions, we do not actively test jQuery in them and generally do not fix bugs that may appear in them.
Similarly, jQuery does not fix bugs in pre-release versions of browsers, such as beta or dev releases. If you find a bug with jQuery in a pre-release of a browser, you should report the bug to the browser vendor.
[H2] link About Browser Support
jQuery is constantly tested with all of its supported browsers via unit tests. However, a web page using jQuery may not work in the same set of browsers if its own code takes advantage of (or falls prey to) browser-specific behaviors. Testing is essential to fully support a browser.
Only the most current version of jQuery is tested and updated to fix bugs or add features. Users of older versions that find a bug should upgrade to the latest released version to determine if the bug has already been fixed. The jQuery Migrate plugin may be helpful in identifying and fixing problems during a version upgrade.
[H2] link About CSS Selector Compatibility
Regardless of a browser's support of CSS selectors, all selectors listed at https://api.jquery.com/category/selectors/ will return the correct set of elements when passed as an argument of the jQuery function.
CSS styles applied with jQuery's .css() method are dependent on the browser's level of support. In general, jQuery does not attempt to overcome the limitations of a browser's style rendering. (One exception is opacity, which jQuery "shims" for older Internet Explorer's alternative implementation.) Furthermore, prior to version 1.8, jQuery does not normalize vendor-prefixed properties.