JavaScript modules in service workersThe navigator.serviceWorker.register() method accepts { type: "module" } to load scripts that use import and export. Also known as ECMAScript modules or ESM in service workers.js-modulesJavaScript modulesnewly2026-01-13https://w3c.github.io/ServiceWorker/#dom-registrationoptions-typehttps://developer.mozilla.org/docs/Web/API/ServiceWorkerapi.ServiceWorker.ecmascript_modulesjavascript.statements.import.service_worker_supporthttps://nowyoucanuse.com/features--js-modules-service-workers.html