分类：Version 4.0

This is a pre-release. Behavior may change before 4.0.0 final is released.

Aspects of the API that were changed in the corresponding version of jQuery.

Dropped support for IE <11 & Edge Legacy, removed deprecated APIs, added FormData support, improved support for CSP & Trusted Types. Automatic JSONP promotion removed. Special handling of boolean attributes removed.

Callbacks & Deferred modules are now excluded from the Slim build.

jQuery is now authored in ESM.

For more information, see the jQuery Core 4.0 Upgrade guide and the Release Notes/Changelog of jQuery 4.0.0-rc.1.