The fourth of six installments, Paul walks you through the improvements and additions to the API in jQuery 1.4. He demonstrates with real-world examples how you’ll put these new features to use, along with recommendations on performance and useful hints on the internals.
In Hawtness #4, Paul covers
has(), traversing magic, and the ajax- and json-related updates. The code discussed in ep #4 is viewable and forkable on github