Example
// Check if service worker is available.
if ('serviceWorker' in navigator) {
navigator.serviceWorker.register('/sw.js').then(function(registration) {
console.log('SW registration succeeded with scope:', registration.scope);
}).catch(function(e) {
console.log('SW registration failed with error:', e);
});
}
- You can call
register() on every page load. If the SW is already registered, the browser provides you with instance that is already running
- The SW file can be any name.
sw.js is common.
- The location of the SW file is important because it defines the SW's scope. For example, an SW file at
/js/sw.js can only intercept fetch requests for files that begin with /js/. For this reason you usually see the SW file at the top-level directory of the project.
