Simplify dynamic JavaScript UIs with the Model-View-View Model (MVVM) pattern

Key concepts

More features

  • Free, open source (MIT license)
  • Pure JavaScript — works with any web framework
  • Small & lightweight — 54kb minified

    ... reduces to 20kb when using HTTP compression

  • No dependencies
  • Supports all mainstream browsers, even ancient ones

    IE 6+, Firefox 3.5+, Chrome, Opera, Safari (desktop/mobile)

  • Fully documented

    API docs, live examples, and interactive tutorials included

Get started

New: Interactive tutorials

Get started with knockout.js quickly, learning to build single-page applications, custom bindings and more with these interactive tutorials.

Live example

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By encapsulating data and behavior into a view model, you get a clean, extensible foundation on which to build sophisticated UIs without getting lost in a tangle of event handlers and manual DOM updates.