Courses / Frontend Security & Observability
19. CDN caching strategies for SPAs
Concepts for caching HTML/JS/CSS at CDNs including stale-while-revalidate and edge TTL policies (provider-agnostic).
JavaScript
CDN caching strategies for SPAs
Rules for how a CDN should store and serve your single-page app assets (HTML, JS, CSS) so users get fast and correct content.
"I want fast pages for returning users but I also need deploys to show up quickly."
CDN caching strategies are rules (headers and edge settings) that control how long assets are served from cache, when stale copies can be used, and when the CDN should fetch fresh content from origin; for SPAs you combine short HTML TTLs with long immutable asset caching and optional stale-while-revalidate to balance speed and freshness.
"I want fast pages for returning users but I also need deploys to show up quickly."
CDN caching strategies are rules (headers and edge settings) that control how long assets are served from cache, when stale copies can be used, and when the CDN should fetch fresh content from origin; for SPAs you combine short HTML TTLs with long immutable asset caching and optional stale-while-revalidate to balance speed and freshness.