jQuery 4.0 hits beta, with bug fixes, removed support and performance improvements
The jQuery team has released version 4.0 beta, noting that support for Internet Explorer (IE) 10 and lower has been dropped, and warning of breaking changes.
Although jQuery 4.0 includes bug fixes and performance improvements, according to jQuery Team Lead Timmy Willison, the release is as much about what is removed as what is new. Support for a number of web browsers has been dropped, including versions of IE prior to 11, Edge Legacy (not based on the Chromium engine), iOS prior to 11, Firefox older than version 65, and others.
A significant change in the way jQuery is developed is that version 4.0 now uses ES (ECMAScript) modules and is packaged with Rollup rather than RequireJS.