Storage Lite

Storage Lite provides a lightweight YUI 3 API for persistent cross-browser local key/value storage similar to the HTML5 localStorage API. Supported browsers include IE6+, Firefox 2+, Safari 3.1+, Chrome 4+, and Opera 10.5+. No browser plugins are required (not even Flash).

Storage Lite will automatically use the best available local storage API supported by the browser it's running in. The complexities of the following storage APIs are all wrapped in a loving YUI 3 embrace and presented to you as a single consistent HTML5-like API:

• Firefox 3.5+, Chrome 4+, Safari 4+, IE8+, Opera 10.5+: localStorage -- these modern browsers all support the core localStorage functionality defined in the Web Storage spec.

• Firefox 2.x and 3.0.x: Gecko globalStorage, an early API similar to localStorage.

• Safari 3.1 and 3.2: Database Storage, because Safari 3.1 and 3.2 don't support localStorage.

• IE6, IE7: userData persistence, a rarely used IE feature for associating string data with an element on a web page and persisting it between pageviews.

When minified, Storage Lite weighs in at about 2.6KB before gzip, making it ideal for performance-critical web apps that need client-side storage capabilities across all A-grade browsers and can't depend on non-standard browser extensions.

Examples

See the examples directory for usage examples.

Caveats

• IE userData storage, which is used for IE6 and IE7, has a per-document storage limit (in most cases) of 64KB, which is much lower than the limits of the other storage providers. If you exceed this limit, a Y.StorageFullError exception will be raised.

• IE userData storage persists across pageviews, but does not persist across browser restarts. All other storage providers persist across both pageviews and browser restarts.

License

Copyright (c) 2012 Ryan Grove (ryan@wonko.com) All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

• Neither the name of this project nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.