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# YUI Library Examples: Cookie Utility (beta): Advanced Cookie Example

# Cookie Utility (beta): Advanced Cookie Example

This example shows how to get, set, and remove cookies using the YUI Cookie utility.

### Note:

Keep an eye on the Logger console at right to view the log messages associated with this example.

Click the buttons to interact with the cookie:

## Advanced Cookie Example

This example consists of three buttons, each of which performs one of the basic cookie functions: getting a value, setting a value, and removing a value. The first button, "Get Value", retrieves the value of a cookie and displays it in an alert:

YAHOO.util.Event.on("yui-cookie-btn1", "click", function(){ var value = YAHOO.util.Cookie.get("example"); alert(value); YAHOO.log("Cookie 'example' has a value of '" + value + "'"); });

The second button, "Set Random Value", creates a random value and sets the cookie's value equal to it:

YAHOO.util.Event.on("yui-cookie-btn2", "click", function(){ var newValue = "yui" + Math.round(Math.random() * Math.PI * 1000); YAHOO.util.Cookie.set("example", newValue); YAHOO.log("Set cookie 'example' to '" + newValue + "'"); });

After clicking this button, you can go back and click "Get Value" to see the new value that was assigned to the cookie (you can also check the logger output).

The third button, "Remove Value", completely removes the cookie from the page:

YAHOO.util.Event.on("yui-cookie-btn3", "click", function(){ YAHOO.util.Cookie.remove("example"); YAHOO.log("Removed cookie 'example'."); });

When this button is clicked, it removes the cookie. If "Get Value" is clicked immediately afterwards, the value should be `null`.

### YUI Logger Output:

Note: You are viewing this example in debug mode with logging enabled. This can significantly slow performance.

Reload with logging
and debugging disabled.

### Cookie Utility (beta) Examples:

- Simple Cookie Example
- Advanced Cookie Example
- Subcookie Example

### More Cookie Utility (beta) Resources:

- User's Guide (external)
- API Documentation
- Cheat Sheet PDF (external)

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