In this example we will create an external module and use it as a core module.

{{>external-html}}

Creating your external module

This is a simple example of creating an external module with `YUI.add`.

This module simply adds an `External` namespace to the `Y` object and exports a single `run` method.

``` {{>external-module}} ```

Using the instance config

Now that we have our external module, we need to add it to the `modules` config on the `YUI` instance that you want to attach this module to.

``` {{>external-config}} ```

Setting up for the module

Now we add the HTML needed to make this module run:

``` {{>external-html}} ```

Now we put it all together and you should see the message in the example box above.

``` {{>external-js}} ```