# Providing Chart Data via a JavaScript Array

You can use Visualforce charting with non-Salesforce data sources by building a JavaScript array, in your own JavaScript code in your page, and providing the name of that array to `<apex:chart>`.

The following trivial code illustrates this technique:

```visualforce
<apex:page>
    <script>
    // Build the chart data array in JavaScript
    var dataArray = new Array();
    dataArray.push({'data1':33,'data2':66,'data3':80,'name':'Jan'});
    dataArray.push({'data1':33,'data2':66,'data3':80,'name':'Feb'});
    // ...
    </script>

    <apex:chart data="dataArray" ...></apex:chart>
</apex:page>
```

When using this technique, if your data is coming from a non-Salesforce source, you might not need any server-side Apex code at all.

**See Also**

- [Chart Data Format](/docs/platform/salesforce-pages-developers-guide/guide/pages-charting-overview-providing-data-format.md)