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# YUI Library Examples: Cookie: Subcookie Example

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## Cookie: Subcookie Example

This example shows how to get and set subcookies as well as using conversion functions when retrieving subcookie values.

## Subcookie Example

The first three lines attempt to read the values stored in subcookies of the "example" cookie:

var name = Y.Cookie.getSub("example", "name"); var today = Y.Cookie.getSub("example", "today", function(value){ return new Date(value); }); var count = Y.Cookie.getSub("example", "count", Number);

The "name" subcookie stores a string so it is retrieved without specifying a third argument. The "today" subcookie stores a date string, which should be converted to a `Date` object upon retrieval; the third argument of `getSub()` is specified as a custom function that will convert the returned value into a `Date` object. The "count" subcookie contains a number and is converted to an actual JavaScript number by passing in the native `Number` function. If any of these subcookies don't exist, `getSub()` returns `null` (this should be the case the first time you run the example). The retrieved values are output in the logger.

After that, new values are assigned to the various subcookies:

Y.Cookie.setSub("example", "name", "Yahoo!"); Y.Cookie.setSub("example", "today", (new Date()).toString()); Y.Cookie.setSub("example", "count", Math.round(Math.random() * 30));

The "name" subcookie is set to "Yahoo!", the "today" subcookie is set to the value of a new `Date` object, outputting its string representation, and the "count" subcookie is filled with a random number. The next time you run the example, the subcookies should have these values.

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