註銷(uninstall)service worker

如果要註銷(uninstall)PWA 的 service worker，可以用以下的方法。

serviceWorkerRegistration.unregister().then(function(boolean) {
});

範例：

if ('serviceWorker' in navigator) {
  navigator.serviceWorker.register('/sw-test/sw.js', {scope: 'sw-test'}).then(function(registration) {
    // registration worked
    console.log('Registration succeeded.');
    registration.unregister().then(function(boolean) {
      // if boolean = true, unregister is successful
    });
  }).catch(function(error) {
    // registration failed
    console.log('Registration failed with ' + error);
  });
};

navigator.serviceWorker.getRegistrations().then(function(registrations) {
 for(let registration of registrations) {
  registration.unregister()
} })