Original author(s) Written in JavaScript | Development status Active | |
Initial release July 5, 2010 (2010-07-05) Stable release 3.4.1 / November 8, 2016 (2016-11-08) Repository github.com/knockout/knockout | ||
Knockout is a standalone JavaScript implementation of the Model-View-ViewModel pattern with templates. The underlying principles are therefore:
Contents
The latter leverages the native event management features of the JavaScript language.
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 as an open source project by Steve Sanderson, a Microsoft employee. As the author said, "it continues exactly as-is, and will evolve in whatever direction I and its user community wishes to take it", and stressed, "this isn’t a Microsoft product".
Features
Knockout includes the following features:
Simple example
In this example, two text boxes are bound to observable variables on a data model. The "full name" display is bound to a dependent observable, whose value is computed in terms of the observables. When either text box is edited, the "full name" display is automatically updated, with no explicit event handling.