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For front-end developers who crave maintainable assets, Jam is a package manager for JavaScript. Unlike other repositories, we put the browser first.

  • Manage dependencies - Using a stack of script tags isn't the most maintainable way of managing dependencies, with Jam packages and loaders like RequireJS you get automatic dependency resolution.

  • Fast and modular - Achieve faster load times with asynchronous loading and the ability to optimize downloads. JavaScript modules and packages provide properly namespaced and more modular code.

  • Use with existing stack - Jam manages only your front-end assets, the rest of your app can be written in your favourite language or framework. Node.js tools can use the repository directly with the Jam API.

  • Custom builds - No more configuring custom builds of popular libraries. Now, every build can be optimized automatically depending on the parts you use, and additional components can always be loaded later.

  • Focus on size - Installing multiple versions works great on the server, but client-side we don't want five versions of jQuery! Jam can use powerful dependency resolution to find a working set of packages using only a single version of each.

  • 100% browser - Every package you see here will work in the browser and play nicely with module loaders like RequireJS. We're not hijacking an existing repository, we're creating a 100% browser-focused community!

Visit the Jam website

Example usage

$ jam install jquery
<script src="jam/require.js"></script>

    require(['jquery'], function ($) {

Learn more...


# npm install -g jamjs

Requires node.js


To customize Jam setting create .jamrc file in your home directory.

Edit /lib/jamrc.js to change paths to .jamrc file and it's name.



An array with npm repositiories. Jam uses by default, but it's possible to create a local, e.g. corporate, repository.

  , ""


Output Jam directory (defaults to `./jam`).

```exports.package_dir = 'libs';```