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https://github.com/knockout/knockout

Knockout makes it easier to create rich, responsive UIs with JavaScript
https://github.com/knockout/knockout

data-binding javascript knockout mvvm

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Knockout makes it easier to create rich, responsive UIs with JavaScript

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# Knockout



**Knockout** is a JavaScript [MVVM](http://en.wikipedia.org/wiki/Model_View_ViewModel) (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.



## Getting started



[![Join the chat at https://gitter.im/knockout/knockout](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/knockout/knockout?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)



**Totally new to Knockout?** The most fun place to start is the [online interactive tutorials](http://learn.knockoutjs.com/).



For more details, see



 * Documentation on [the project's website](http://knockoutjs.com/documentation/introduction.html)

 * Online examples at [http://knockoutjs.com/examples/](http://knockoutjs.com/examples/)



## Downloading Knockout



You can [download released versions of Knockout](http://knockoutjs.com/downloads/) from the project's website.



For Node.js developers, Knockout is also available from [npm](https://npmjs.org/) - just run `npm install knockout`.



## Building Knockout from sources



If you prefer to build the library yourself:



1. **Clone the repo from GitHub**



   ```sh

   git clone https://github.com/knockout/knockout.git

   cd knockout

   ```



2. **Acquire build dependencies.**



   Make sure you have [Node.js](http://nodejs.org/) and [Java](https://www.java.com/en/) installed on your workstation. These are only needed to _build_ Knockout from sources. Knockout itself has no dependency on Node.js or Java once it is built (it works with any server technology or none). Now run:



   ```sh

   npm install

   ```



3. **Run the build tool**



   ```sh

   npm run grunt

   ```

   Now you'll find the built files in `build/output/`.



   To run a single task, use `--`



   ```sh

   npm run grunt -- build:debug

   ```



## Running the tests



If you have [phantomjs](http://phantomjs.org/download.html) installed, then the `grunt` script will automatically run the specification suite and report its results.



Or, if you want to run the specs in a browser (e.g., for debugging), simply open `spec/runner.html` in your browser.



## License



MIT license - [http://www.opensource.org/licenses/mit-license.php](http://www.opensource.org/licenses/mit-license.php)