Workers - Workers fetch requests now support cf.vary

Workers fetch() requests now support the cf.vary request option. Use cf.vary to control how Cloudflare caches origin responses with a Vary header for a single subrequest. JavaScript export default { async fetch ( request ) { return fetch ( request , { cf : { vary : { default : { action : "bypass" }, headers : { accept : { action : "normalize" , media_types : [ "text/html" , "application/json" ] , }, "accept-language" : { action : "normalize" , languages : [ "en" , "fr" , "de" ] , }, }, }, }, } ) ; }, }; TypeScript export default { async fetch ( request ) : Promise < Response > { return fetch ( request , { cf : { vary : { default : { action : "bypass" }, headers : { accept : { action : "normalize" , media_types : [ "text/html" , "application/json" ] , }, "accept-language" : { action : "normalize" , languages : [ "en" , "fr" , "de" ] , }, }, }, }, } ) ; }, } satisfies ExportedHandler ; For more information, refer to cf.vary .