Add a Cache-Control header to the response - Amazon CloudFront
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Add a Cache-Control header to the response

The following example function adds a Cache-Control HTTP header to the response. The header uses the max-age directive to tell web browsers to cache the response for a maximum of two years (63,072,000 seconds). For more information, see Cache-Control on the MDN Web Docs website.

This is a viewer response function.

See this example on GitHub.

JavaScript runtime 2.0
async function handler(event) {
    const response = event.response;
    const headers = response.headers;
    
    // Set the cache-control header
     headers['cache-control'] = {value: 'public, max-age=63072000'};
        
    // Return response to viewers
    return response;
}
JavaScript runtime 1.0
function handler(event) {
    var response = event.response;
    var headers = response.headers;

    // Set the cache-control header
    headers['cache-control'] = {value: 'public, max-age=63072000'};

    // Return response to viewers
    return response;
}