--- title: Amazon CloudFront Functions now supports logging to... description: CloudFront Functions now supports writing custom log data directly into CloudFront access logs via a new cf.logCustomData() helper method. Previously, function... canonical: https://daily.dev/posts/amazon-cloudfront-functions-now-supports-logging-to-cloudfront-access-logs-rc9tzrrqf twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Amazon CloudFront Functions now supports logging to CloudFront access logs | daily.dev og:description: CloudFront Functions now supports writing custom log data directly into CloudFront access logs via a new cf.logCustomData() helper method. Previously, function... og:url: https://daily.dev/posts/amazon-cloudfront-functions-now-supports-logging-to-cloudfront-access-logs-rc9tzrrqf og:image: https://api.daily.dev/og/posts/RC9TzRrqf.png og:image:alt: Amazon CloudFront Functions now supports logging to CloudFront access logs og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Amazon CloudFront Functions now supports logging to CloudFront access logs **[AWS](https://daily.dev/sources/aws)** · 2 min read · 0 upvotes · 0 comments ## Summary CloudFront Functions now supports writing custom log data directly into CloudFront access logs via a new cf.logCustomData() helper method. Previously, function log output went only to CloudWatch Logs as a separate file, requiring manual correlation with access logs. The new method lets developers log values like A/B test assignments, authentication outcomes, or routing decisions inline with the access log record for each request. It works with both real-time log configurations and standard logging (v2), enabling unified analysis in a single query. The feature is available in all CloudFront edge locations at no additional charge beyond standard invocation and log delivery pricing. ## Full article daily.dev links to this article rather than hosting it. 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