https://takao.blog/en/tags/offline/Recent content in Offline on Commentary of TakaoHugo -- gohugo.ioenCommentary of TakaoSat, 13 Jun 2026 23:11:50 +0900https://takao.blog/en/web/service-workers-offline/Mon, 12 Feb 2024 00:00:00 +0900https://takao.blog/en/web/service-workers-offline/<img src="https://takao.blog/img/thumnail.webp" alt="Featured image of post Service Workers: Advanced Offline Strategies for Web Apps" /><p>Service workers are the foundation of offline-capable progressive web apps. With browser support now universal across Chrome, Firefox, Safari, and Edge, building resilient offline experiences is a production requirement, not a progressive enhancement. This guide covers advanced strategies for caching, synchronization, and offline-first architecture.</p> <h2 id="service-worker-lifecycle-and-fundamentals">Service Worker Lifecycle and Fundamentals </h2><p>A service worker goes through three key events: <code>install</code>, <code>activate</code>, and <code>fetch</code>. During installation, you pre-cache static assets. Activation handles cleanup of old caches. Every fetch request passes through the worker, giving you full control over the response.</p>