YUI Library Examples: YAHOO Global Object: Type-Checking Your Data

Yahoo! recommends YUI 3. Learn about YUI 3 on YUILibrary.com.

YAHOO Global Object: Type-Checking Your Data

The Yahoo Global Object includes several useful type-checking methods in the YAHOO.lang object. Click the Check button in each row to evaluate the data.

View example in new window.

Data	isObject	isArray	isFunction
`null`
`[] or new Array()`
`{} or new Object()`
`function Foo() {}`
`new Foo()`
`elem.getElementsByTagName('p')`
`YAHOO.util.Dom. getElementsByClassName( 'foo','p',elem)`

YAHOO.lang comes with YAHOO

YAHOO.lang comes bundled with the YAHOO Global Object.

If you are using any other YUI components on your page, you should already have YAHOO.lang available.

Checking types

In this example, we use a few of the type-checking methods available in YAHOO.lang to test various types of data.

Other type checking methods

YAHOO.lang currently supports the following type checking methods:

Configuration for This Example

You can load the necessary JavaScript and CSS for this example from Yahoo's servers. Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured.

YAHOO Global Object Examples:

More YAHOO Global Object Resources:

All YUI 2.x users should review the YUI 2.8.2 security bulletin, which discusses a vulnerability present in YUI 2.4.0-2.8.1.