> For the complete documentation index, see [llms.txt](https://docs.duplocloud.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.duplocloud.com/docs/automation-platform/overview/aws-services/cloudfront/cloudfront-functions.md).

# CloudFront Functions

Configure CloudFront Functions in DuploCloud

CloudFront Functions enable you to run lightweight JavaScript code at AWS edge locations to customize viewer requests and responses with low latency and high performance.

## Adding a CloudFront Function

1. In the DuploCloud Portal, navigate to **Cloud Services** -> **Networking**.
2. Select the **CloudFront** tab.
3. Select the **Functions** tab.
4. Click **Add**. The **Add Function** page displays.<br>

   <div align="left"><figure><img src="https://2471407984-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F68cb0s9ce5UIUKWPuYs8%2Fuploads%2FRuilwGqzpZHuLUZhmAmW%2FScreenshot%20(684).png?alt=media&amp;token=106c2f70-50df-4ba5-a68c-8790e2001ec7" alt=""><figcaption><p><strong>Add Function</strong> page</p></figcaption></figure></div>
5. Complete the following fields:

<table data-header-hidden><thead><tr><th width="230">Field</th><th>Description</th></tr></thead><tbody><tr><td><strong>Name</strong></td><td>Enter a unique name for the CloudFront function.</td></tr><tr><td><strong>Description</strong></td><td>Provide a short description of what the function does.</td></tr><tr><td><strong>Runtime Version</strong></td><td>Select the runtime version to use, e.g., <strong>cloudfront-js-2.0</strong>.</td></tr><tr><td><strong>Function Code</strong></td><td>Enter the JavaScript code for your function in the editor.</td></tr></tbody></table>

6. Click **Submit** to create the CloudFront Function.

Once created, you can associate this function with [CloudFront distributions](/docs/automation-platform/overview/aws-services/cloudfront/cloudfront.md) to customize behavior at the edge.


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