Cache-Control interactive explainer

# Cache-Control interactive explainer Change the response policy and watch how the browser cache changes the next request.

Policy

max-age seconds stale-while-revalidate seconds resource changes at second

## What to notice - `max-age` allows a browser to reuse a response without a request while it is fresh. - `no-cache` can still store a response, but it must revalidate before reuse. - `no-store` should not keep a reusable response. - `immutable` tells the browser that a fresh response will not change at the same URL. - `stale-while-revalidate` favors speed by showing stale content while refreshing the cache.