
I recently explored the key component that sets progressive web apps apart from regular web pages: service workers. These workers act as a proxy between the network and your web page, enabling various functionalities like caching assets for offline access, serving default images, and supporting push notifications.
Service workers operate on a separate thread, which means they don't have access to the DOM or global variables. They also support only asynchronous calls and are initially downloaded after the first page load. Despite these limitations, service workers are a powerful tool for enhancing web app performance and user experience.
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