![]() ![]() This opens up tons of possibilities for user-driven interactions with a Cache instance. The Cache interface can be accessed within the service worker scope and within the scope of the main thread. # Access to a JavaScript-driven caching APIĪn indispensable aspect of service worker technology is the Cache interface, which is a caching mechanism wholly separate from the HTTP cache. After a service worker is installed and activated, it controls the page to offer improved reliability and speed. On the very first visit to a web page that installs a new service worker, the initial visit to a page provides its baseline functionality while the service worker downloads. The service worker lifecycle is similar, but with a progressive enhancement approach. The app is ready to use and can be launched.A request is made to download the application.Think of what happens when a native app is installed from an app store: ![]() Service workers progressively enhance websites through a lifecycle similar to platform-specific applications. ![]() This means that if users on browsers that don't support service workers visit websites that use them, no baseline functionality is broken. Service workers are an enhancement to existing websites. # A progressively enhancing, app-like lifecycle They aim to improve reliability by providing offline access, as well as boost page performance. Service workers are specialized JavaScript assets that act as proxies between web browsers and web servers. To view a running list of service workers, enter chrome://serviceworker-internals/ into your address bar. Thus, these first few bits of documentation will cover that underlying technology before getting into Workbox specifics. However, because service workers solve hard problems, any abstraction of that technology will also be tricky without understanding it. Workbox makes service workers easier to use. Service workers offer incredible utility, but can be tricky to work with at first. ![]()
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