Squirrel.js

A cache manager evening out the W3C's localStorage and IE's userData that plays nicely in the sandbox.

What's new in this release?

See the CHANGELOG file for information on what's new.

Requirements

A browser that supports caching via userData or localStorage.

Note: if the browser doesn't support these features, Squirrel will not be active, but it won't throw an error.

Installation/Usage

Put Squirrel.js in a directory on your website, e.g. /js.

Then create a new Squirrel, passing it an id for your cache (which should be unique for your application):

var $S = new Squirrel( 'scale-song' );

In IE, you can optionally supply a second argument for the number of seconds you want the cache to live:

var $S = new Squirrel( 'scale-song', 10080 ); // store one week

You can use Squirrel to store and retrieve info from the cache:

$S.write( 'doe', 'ray' );
$S.read( 'doe' ); // 'ray'

You can even create sub-caches by supplying an optional string to beginning of these methods:

$S.write( 'song', 'doe', 'a dear, a female dear' );
$S.read( 'doe' ); // 'ray'
$S.read( 'song', 'doe' ); // 'a dear, a female dear'

With Squirrel, you can also clean up the cache using one of two methods: remove() (for individual keys) or clear() (for the cache or sub-caches):

// removing a single property from a sub-cache
$S.remove( 'song', 'doe' );
$S.read( 'song', 'doe' ); // null
$S.read( 'doe' ); // 'ray'

// clearing a sub-cache
$S.write( 'song', 'doe', 'a dear, a female dear' );
$S.write( 'song', 'ray', 'a drop of golden sun' );
$S.clear( 'song' );
$S.read( 'song', 'doe' ); // null
$S.read( 'song', 'ray' ); // null
$S.read( 'doe' ); // 'ray'

// removing a property form the main cache
$S.remove( 'doe' );
$S.read( 'doe' ); // null

// clearing the whole cache
$S.write( 'doe', 'ray' );
$S.write( 'song', 'doe', 'a dear, a female dear' );
$S.write( 'song', 'ray', 'a drop of golden sun' );
$S.clear();
$S.read( 'song', 'doe' ); // null
$S.read( 'song', 'ray' ); // null
$S.read( 'doe' ); // null

The distribution

Besides the Squirrel.js files in /src, there's a complete test tree included (/tests) which holds assorted tests for Squirrel.js and a minified version in /min.

License

Squirrel.js is licensed under the terms of the MIT License, see the included MIT-LICENSE file.

License

easy-designs/Squirrel.js

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