Workboxstrategies

Workbox-strategies is a modular component of the Workbox library that provides a set of fetch strategies for service workers. It offers classes that implement common caching and network patterns used to respond to fetch events, often in combination with Workbox routing. By encapsulating policy in strategy objects, developers can apply consistent behavior across routes and resources.

Common strategies include:

- CacheFirst: serve from the cache if a cached response exists; otherwise fetch from the network and cache the result for future requests.

- NetworkFirst: attempt to fetch from the network first; if the network request fails, fall back to a cached response.

- StaleWhileRevalidate: respond with a cached result immediately and fetch the latest version in the background to update the cache.

- NetworkOnly: bypass the cache and always request the network.

- CacheOnly: serve only from the cache; if a cached response is not available, the request fails.

Strategies can be customized with options such as cacheName, plugins for expiration or cacheable responses, and fetch options. They are wired to URL patterns via Workbox Routing, enabling per-route strategy selection.

Relation to other Workbox modules: workbox-strategies is often used alongside workbox-routing for defining routes and workbox-precaching for static assets. Together, these modules help build offline-capable apps by combining caching policies with asset preloading and cache management. This provides a neutral, concise overview of Workbox-strategies and its role in service worker caching patterns.