SMRTR ProgrammingJan 29, 2026Daily.dev

Adding dynamic features to an aggressively cached website

SMRTR summary

Simon Willison demonstrates implementing dynamic features on an aggressively cached blog using localStorage and JavaScript. Two key patterns emerge: admin-only edit links visible through localStorage flags, and a random tag navigation system that persists across page loads using timestamped localStorage entries. Both features work seamlessly with Cloudflare's 15-minute cache headers.

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