Compare Ease of Development
Throughout the process of building and testing the prototypes using each AJAX framework, we got a good understanding of how to work with each framework and the strengths and weaknesses of each.
We took a look at the source code of each framework and felt that YUI is easier to understand because of its well-documented code and detailed tutorials from the Yahoo website. At the time of this development project, both Dojo and Prototype lacked complete documentation and we had to try to build our own prototypes. In the end, YUI stands out as the easiest to work with.