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Paging Extension
================
The paging extension adds extra functionality to Infinite AJAX Scroll.
* Tracking of pages
* A new event `pageChange`
This extension is bundled with IAS as a core extension.
## Usage
After [you initialized IAS](getting-started.html#javascript) you can register the extension:
```javascript
jQuery.ias().extension(new IASPagingExtension());
```
## Events
### pageChange
| argument | type | description |
|--------------|--------|---------------------------------------------------|
| pageNum | number | page number the user scrolled to (first page = 1) |
| scrollOffset | number | scroll offset at which the page starts |
| url | string | url of the page |
Triggered when a used scroll to another page.
## Example
```javascript
jQuery.ias().on('pageChange', function(pageNum, scrollOffset, url) {
console.log(
"Welcome at page " + pageNum + ", " +
"the original url of this page would be: " + url
);
});
```