Cache Handlers Demo Features

• SWR JSON endpoint (background revalidation)
• Blocking SWR endpoint
• SWR disabled endpoint
• ETag + conditional requests
• Cache-Vary header example (Accept-Language)
• Cache-Vary header with multiple dimensions
• Tag A (cache-tag: group:a)
• Tag B (cache-tag: group:b)
• Manual invalidation trigger placeholder

Inspect the Cache-Status header to see hits, misses, stale behaviour.