Registering a service worker

Service workers must be registered from a web page. This is done in a normal UI script. Before you call the register method, you should feature detect service worker support. If supported, the navigator object has a serviceWorker property:

if ('serviceWorker' in navigator) {
 } 

If the browser supports service workers, you can then safely register your service worker. The serviceWorker object has a register method, so you need to supply a URL reference to the service worker script:

if ('serviceWorker' in navigator) {
 navigator.serviceWorker.register('/sw.js')
 .then(function(registration) {
 // Registration was successful
 });
 }

The serviceWorker.register("sw path"[, options]) function accepts two parameters. The first is the path to the service worker. This path is relative to the site origin or root folder.

The second parameter is optional, and is an object containing registration options. For now, the only option available is scope. An object was used to afford...