At the time I wrote these books, jQuery was the most popular library available. In fact, both books emphasize use of jQuery for programming needs. It turns out that jQuery is still the most popular library around and for good reason, the producers of jQuery have done just about everything right, so developers continue to support them. If you need general interface and low level programming support, jQuery and jQuery UI are good places to start. What it really comes down to is reducing costs and getting work done faster. Money drives everything on the Internet, including your next project.
Two libraries simply can’t meet every need. Developers often use a wide variety of libraries to get the job done. Choosing the right library can be difficult. There are literally hundreds of them, all purporting to do the job faster, better, and for less money (when money is directly involved in the equation). Choosing the wrong library can incur huge penalties. That’s why a site such as Libscore is so important. You can use Libscore to find the top:
The last option is the most important because it tells you what the top sites are and which libraries they use to achieve their goals. By viewing the site and seeing how it uses a library, you can make intelligent decisions for your own site. Exploring Libscore doesn’t take long, but can net you huge gains in productivity that translate into reduced costs and fewer errors.