分类：Version 1.12 & 2.2

Aspects of the API that were changed in the corresponding versions of jQuery. Changes in jQuery 1.12 and 2.2 include performance improvements of the selector engine, manipulation of class names for SVG elements, support for the Symbol type and iterators added in ES2015, and a new hook has been added for filtering HTML.

For more information, see the Release Notes/Changelog.

Utilities

jQuery.uniqueSort()

Sorts an array or an array-like object of DOM elements, in place, with the duplicates removed. Note that this only works on arrays/array-likes of DOM elements, not strings or numbers.
Attributes | Manipulation > Class Attribute | CSS

.toggleClass()

在匹配的元素集合中的每个元素上添加或删除一个或多个样式类,取决于这个样式类是否存在或值切换属性。即：如果存在（不存在）就删除（添加）一个类。