Ever since the explosion of web-oriented apps, the need for doing complex things simpler becomes more obvious. Creating richer & more sophisticated UI's usually involves using JavaScript API's like JQuery.
What?
Knockout.js is an open-source JavaScript library (yep, not Microsoft - licensed under the MIT) that helps you create rich, responsive display & editor user interfaces with a clean underlying data model.
Any time you have sections of your UI that update automatically, Knockout.js can help you implement it in a simpler, more maintainable fashion.
Why?
The problem with designing for the web is that rich user interactivity is fairly hard to do. Even when using a JavaScript library (like JQuery) it can become quite cumbersome. Before you know it, you have a mess of inter-related event handlers that all pretty much do the same thing.
Now, with Knockout, we can say hello to more structured code based on true object orientation & declarative bindings. This means that Knockout brings the MVVM pattern comes to the web.
Like any other good JavaScript library, Knockout also supports a wide variety of browsers like IE 6+, FireFox 2+, Chrome, Safari & Opera.
Knockout can be added on top of your existing web application without requiring major architectural changes.
Developers familiar with Ruby on Rails, ASP.NET MVC, or other MV* technologies may see MVVM as a real-time form of MVC with declarative syntax. In another sense, you can think of KO as a general way to make UIs for editing JSON data… whatever works for you :)
How?
The best way of explaining Knockout.js is to actually show you. In order to keep this post short & sweet and on to the point - here's a link to the interactive tutorials found on the website - knockoutjs.com
Also - I've uploaded an simple example based on my demo on SkyDrive here
