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    A package manager for the web, created at Twitter
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    Bower - A package manager for the web

    Build Backers on Open Collective Sponsors on Open Collective

    ..psst! While Bower is maintained, we recommend yarn and webpack or parcel for new front-end projects!

    Bower offers a generic, unopinionated solution to the problem of front-end package management, while exposing the package dependency model via an API that can be consumed by a more opinionated build stack. There are no system wide dependencies, no dependencies are shared between different apps, and the dependency tree is flat.

    Bower runs over Git, and is package-agnostic. A packaged component can be made up of any type of asset, and use any type of transport (e.g., AMD, CommonJS, etc.).

    View complete docs on

    View all packages available through Bower's registry.


    $ npm install -g bower

    Bower depends on Node.js and npm. Also make sure that git is installed as some bower packages require it to be fetched and installed.


    See complete command line reference at

    Installing packages and dependencies

    # install dependencies listed in bower.json
    $ bower install
    # install a package and add it to bower.json
    $ bower install <package> --save
    # install specific version of a package and add it to bower.json
    $ bower install <package>#<version> --save

    Using packages

    We discourage using bower components statically for performance and security reasons (if component has an upload.php file that is not ignored, that can be easily exploited to do malicious stuff).

    The best approach is to process components installed by bower with build tool (like Grunt or gulp), and serve them concatenated or using a module loader (like RequireJS).

    Uninstalling packages

    To uninstall a locally installed package:

    $ bower uninstall <package-name>

    prezto and oh-my-zsh users

    On prezto or oh-my-zsh, do not forget to alias bower='noglob bower' or bower install jquery\#1.9.1

    Never run Bower with sudo

    Bower is a user command; there is no need to execute it with superuser permissions.

    Windows users

    To use Bower on Windows, you must install Git for Windows correctly. Be sure to check the options shown below:

    Git for Windows

    Git for Windows

    Note that if you use TortoiseGit and if Bower keeps asking for your SSH password, you should add the following environment variable: GIT_SSH - C:\Program Files\TortoiseGit\bin\TortoisePlink.exe. Adjust the TortoisePlink path if needed.

    Ubuntu users

    To use Bower on Ubuntu, you might need to link nodejs executable to node:

    sudo ln -s /usr/bin/nodejs /usr/bin/node


    Bower can be configured using JSON in a .bowerrc file. Read over available options at


    You can ask questions on following channels in order:


    We welcome contributions of all kinds from anyone. Please take a moment to review the guidelines for contributing.

    Note that on Windows for tests to pass you need to configure Git before cloning:

    git config --global core.autocrlf input


    Support us with a monthly donation and help us continue our activities. [Become a backer]


    Copyright (c) 2012-present Twitter and other contributors

    Licensed under the MIT License

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