What is KnockoutJS
A clear separation between domain data, view components and data to be displayed the presence of a clearly defined layer of specialized code to manage the relationships between the view components.
These features streamline and simplify the specification of complex relationships between view components, which in turn make the display more responsive and the user experience richer.
Knockout was developed and is maintained by Steve Sanderson, a Microsoft employee. The author stresses that this is a personal open-source project, and not a Microsoft product
Knockout includes the following features:
Automatic UI refresh (when the data model's state changes, the UI updates automatically)
Templating (using a native template engine although other templating engines can be used, such as jquery.tmpl)