# Subscribing to Parent Events

The following code example shows how to call the `subscribe` method so that a canvas app can subscribe to parent events. This example handles the `onscroll` event that fires when the user scrolls in the parent window.

```java
//Subscribe to the parent window onscroll event.
Sfdc.canvas(function() {
    sr = JSON.parse('<%=signedRequestJson%>');
    // Capture the onScrolling event of the parent window
    Sfdc.canvas.client.subscribe(sr.client,
        {name : 'canvas.scroll', onData : function (event) {
            console.log("Parent's contentHeight; " + event.heights.contentHeight);
            console.log("Parent's pageHeight; " + event.heights.pageHeight);
            console.log("Parent's scrollTop; " + event.heights.scrollTop);
            console.log("Parent's contentWidth; " + event.widths.contentWidth);
            console.log("Parent's pageWidth; " + event.widths.pageWidth);
            console.log("Parent's scrollLeft; " + event.widths.scrollLeft);
        }}
    );
});
```

**See Also**

- [Resizing a Canvas App](/docs/platform/canvas-framework/guide/canvas-app-resizing.md)