Some APIs may have changed since these versions were released. If using either version, find out about our version support<.
All the aspects of the API that were added, or had a new signature added, in the corresponding version of jQuery.
Changes in jQuery 1.11 and 2.1 include lower startup overhead & fewer forced layouts; jQuery is now authored via AMD and published to npm & bower under the name jquery.
For more information, see the Release Notes/Changelog<.