Which is the best JavaScript and Ajax Framework ?

Last time, I had published a poll asking which is the best PHP framework and in that poll Zend Framework stand out itself to be the most popular PHP framework among the PHP developers. This time ,I’ve come up with another Poll and I would you to participate in this POLL “Which is the best JavaScript and Ajax Framework?”.

There are many JavaScript and Ajax framework available in the web and I think a lot of Web developers are confused which one to begin with. Today, I would like to hear from you which is the best JavaScript Framework among the popular JavaScript framework jquery, prototype.js, mootools, Dojo and YUI.

First let’s see some facts about these framework.If you look at the google trend of these JavaScript and Ajax framework Dojo seems to be dominant in the year 2007 but jQuery seems to be popular these days.

And if you look at this Slick speed selecter test , it seems that Mootools is providing better performance than the other JavaScript frameworks. Prototype.js is one of the oldest JavaScript and Ajax framework which is widely used in many high profile websites over the Internet. Furthermore, YUI which is supported by yahoo and is another strong framework in the list.

If you ask me which one is best JavaScript framework?, My personal favorite is jQuery as you can see lots of examples in this blog with jQuery. One plus point of jQuery is that it is supported by large community and have a very good documentaion with example in jquery.com.

But I would like to hear from you which JavaScript and Ajax Framework you recommend for other to use in their project.