Version 1.1.3
All the aspects of the API that were added, or had a new signature added, in the corresponding version of jQuery.
jQuery 1.1.3 Release Notes
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jQuery.browser
Contains flags for the useragent, read from navigator.userAgent. We recommend against using this property; please try to use feature detection instead (see jQuery.support). jQuery.browser may be moved to a plugin in a future release of jQuery.
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event.which
For key or button events, this attribute indicates the specific button or key that was pressed.
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jQuery.unique()
Sorts an array of DOM elements, in place, with the duplicates removed. Note that this only works on arrays of DOM elements, not strings or numbers.