It has both positive and negative sides. Some of the positive sides are properly documenting architecture, Possibility to create custom DOM elements and aimed at making application testing easy. Its website is angularjs.org.
It was released in 2010. And it is very popular from its releasing date. There are so many frameworks are releases in that year but among them, this is still in most use frameworks. It has also very distinct characteristics as like other various kinds of frameworks.
Some of the positive aspects of this framework are small in size, simple and fast, quite easy to learn and active community. You can see its detail in backbonejs.org.
It has also some of the popular functions such as Active community, Constant development of features, very simple to learn, Stable performance and Ability of self-configuration. Also, you visit emberjs.com.
It is an official open-source product of Durandal that is famous for creating various tools, libraries, and frameworks. The reputation of its creators speaks for itself, so you can be sure that it will be under professional guidance. The community of experts will take care of that.