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    A client- and server-side multi-layer cache manager library
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    OnionSkin OnionSkin

    NPM version Dependency Status Build Status Code Climate Code Climate

    OnionSkin is multi-layer cache manager library that works with Node.js and vanilla javascript


    You can either install via npm

    $ npm install onionskin

    Or via bower

    $ bower install onionskin

    Or you can just grab a copy of it here

    Basic Usage

    // Library is exposed on the browser with browserify for API consistency with node.js
    var OnionSkin = require('onionskin');
    // Initialize a pool
    var pool = new OnionSkin();
    pool.get('my/key/path', function (err) {
      // Data is either inexistent or expired
      return slowFuncThatReturnsPromise();
    }).then(function (value) {
      // The value that was either on cache or was just generated


    You can find more usage examples at the website's Getting Started section Also there is the API Documentation

    Need help?

    You can:

    Want to help?

    So you decided you want to help... This is awesome!!! Follow this steps and I will be really glad to merge your work and add you to the contributors!

    • Fork the project
    • Clone it and create a branch with the name of the feature you intend to add

        $ git clone
        $ git checkout -b new-feature-name
    • Install the dependencies

        $ bower install # for browser tests
        $ npm install # for node.js tests
    • Please add tests to your features.

      1. Tests run with Mocha and use Chai for expectations.
      2. Expect is preferred to should due to browser compatibility
      3. The test folder respect the same structure as the source, you can run the tests through npm:

        $ npm test

        or run specific tests with mocha:

    mocha test/stash/drivers/*.js
    you also can run the tests on browser
    open test/index.html

    What is coming next

    • WebSQL, Cassandra, MongoDB [, ... ] drivers
    • Benchmarks
    • More examples


    This project was created by @tadeuzagallo inspired by a PHP library named Stash and was originally Stash.js. If you want to join just follow the instructions, any help will be very welcome.



    • The function to generate missing cache should be passed as the last parameter to pool.get, although generating cache Promise.catch is still supported the cache will never be unlocked if or item.set are not called.
    • Also when the cache generator function is passed as parameter, there is no need to call either or item.set, just return the value you want to be cached and it will automatically saved and passed along to the promise chain.
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