[{"data":1,"prerenderedAt":76},["ShallowReactive",2],{"\u002Fglossary\u002Fservice-worker-lifecycle":3,"\u002Fglossary\u002Fservice-worker-lifecycle:related":59},{"id":4,"title":5,"author":6,"authorImage":7,"body":8,"category":44,"date":45,"description":46,"draft":47,"extension":48,"letter":49,"meta":50,"navigation":51,"path":52,"readTime":53,"related":54,"seo":55,"stem":57,"term":5,"__hash__":58},"glossary\u002Fglossary\u002Fservice-worker-lifecycle.md","Service Worker Lifecycle","Fabian Krumbholz","\u002Fimages\u002Fauthors\u002Ffabian-krumbholz.webp",{"type":9,"value":10,"toc":40},"minimark",[11],[12,13,14,15,18,19,22,23,27,28,31,32,35,36,39],"p",{},"The ",[16,17,5],"strong",{}," refers to the sequence of states a ",[16,20,21],{},"Service Worker"," goes through from its initial registration to becoming active. The main phases are ",[24,25,26],"code",{},"installing"," (the browser downloads and parses the script), ",[24,29,30],{},"installed"," (the worker is ready to take control), ",[24,33,34],{},"activating"," (the worker takes control from any old versions), and ",[24,37,38],{},"activated"," (the worker is now running and can handle events like intercepting network requests). Understanding this lifecycle is key for debugging service worker behavior.",{"title":41,"searchDepth":42,"depth":42,"links":43},"",2,[],null,"April 8, 2026","The Service Worker Lifecycle refers to the sequence of states a Service Worker goes through from its initial registration to becoming active.",false,"md","S",{},true,"\u002Fglossary\u002Fservice-worker-lifecycle","1 min read",[],{"title":56,"description":46},"Service Worker Lifecycle: Definition | Web Performance Glossary","glossary\u002Fservice-worker-lifecycle","C3uovU4nTz_Qbwf3pJ8EBCsvvZH0fVsmPuVDaLPiohQ",[60,64,68,72],{"path":61,"title":62,"description":63,"letter":49},"\u002Fglossary\u002Fsearch-engine-optimization-seo","Search Engine Optimization (SEO)","SEO is the process of improving a website's visibility in search engine results pages (like Google). The goal is to rank higher than competitors for relevant search queries to attract more organic (free) traffic.",{"path":65,"title":66,"description":67,"letter":49},"\u002Fglossary\u002Fserver-response-time","Server Response Time","Server Response Time is a component of Time to First Byte that measures how long the server takes to process a request and start sending back a response, excluding network latency.",{"path":69,"title":70,"description":71,"letter":49},"\u002Fglossary\u002Fserver-timing","Server Timing","Server Timing is a browser API that allows the backend to communicate performance metrics about its own internal processes (e.g., database query time, time to render a component) to the browser via HTTP headers.",{"path":73,"title":74,"description":75,"letter":49},"\u002Fglossary\u002Fserver-side-ab-testing","Server-Side A\u002FB Testing","This is a performance-friendly method for running A\u002FB tests. Unlike Client-Side A\u002FB Testing, the decision of which variation to show a user is made on the Origin Server.",1787756716043]