Best and Worst of JavaScript Frameworks
jQuery WIthout a doubt one of the Best frameworks for adding animation effects, autocomplete functionality to your search input fields, JSON and XML reading support, it's no wonder this website uses jQuery as well. The jQuery syntax is very terse but easy to remember, it's just $(".classname") or $("#idname"), there's also the abundance of quality documentation, demos, and plugins. The jQuery syntax integrates so seamlessly with EMCA JavaScript and it is even bundled with Microsoft Visual Studio. So powerful in what this framework can do for your websites. (Editor's note: Whitehouse.gov is powered by jQuery)
YUI I don't want to use the word "Worst" in this case because major websites such as Yahoo, Linkedin, Target, slashdot, and Marketwatch use this framework, so it can't be bad. but there is a learning curve when it comes to learning this framework. I am talking about YUI. Its long namespaces, incomplete documentation makes for website integration difficult. On a positive note, the website for the YUI library cover the major components of any website, this is a good reference when it comes to planning a website redesign. It's helpful to have actual terms when you integrating autocomplete into your website.