What is KnockoutJS?

Knockout is a JavaScript MVVM (a modern variant of MVC) library that makes it easier to create rich, desktop-like user interfaces with JavaScript and HTML. It uses observers to make your UI automatically stay in sync with an underlying data model, along with a powerful and extensible set of declarative bindings to enable productive development.

Knockout is a JavaScript library that helps you to create rich, responsive display and editor user interfaces with a clean underlying data model. Any time you have sections of UI that update dynamically (e.g., changing depending on the user’s actions or when an external data source changes), KO can help you implement it more simply and maintainably.

Headline features

• Elegant dependency tracking – automatically updates the right parts of your UI whenever your data model changes.
• Declarative bindings – a simple and obvious way to connect parts of your UI to your data model. You can construct a complex dynamic UIs easily using arbitrarily nested binding contexts.
• Trivially extensible – implement custom behaviors as new declarative bindings for easy reuse in just a few lines of code.

Additional benefits

• Pure JavaScript library – works with any server or client-side technology
• Can be added on top of your existing web application without requiring major architectural changes
• Compact – around 13kb after gzipping
• Works on any mainstream browser (IE 6+, Firefox 2+, Chrome, Safari, Edge, others)
• Comprehensive suite of specifications (developed BDD-style) means its correct functioning can easily be verified on new browsers and platforms

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 🙂

official knockoutjs.com


src stackshare.io/knockout