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title: Updating Charts with Refreshed Data
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# Updating Charts with Refreshed Data

Redraw a chart with new or updated data by using the `<apex:actionSupport>` component, or by using JavaScript remoting and your own JavaScript code.

`<apex:actionSupport>` allows you to update the chart using only Visualforce. JavaScript remoting requires you to write some JavaScript code, but provides more flexibility and smoother transitions.

-   **[Refreshing Chart Data Using \<apex:actionSupport\>](https://developer.salesforce.com/docs/platform/salesforce-pages-developers-guide/guide/pages-charting-refreshing-data-actionsupport.md)**  


    Update a Visualforce chart in response to a user’s actions by adding the `<apex:actionSupport>` component to Visualforce user interface elements that affect the chart’s data.

-   **[Refreshing Chart Data Using JavaScript Remoting](https://developer.salesforce.com/docs/platform/salesforce-pages-developers-guide/guide/pages-charting-refreshing-data-javascript-remoting.md)**  


    Update a Visualforce chart periodically, or in response to a user’s actions, using custom JavaScript. JavaScript code can respond to complex user activity or timer events, and use JavaScript remoting to retrieve new chart data whenever required.