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| // this code is executed in the context of each tab | |
| import {Workbox} from 'workbox-window'; | |
| if ('serviceWorker' in navigator) { | |
| const wb = new Workbox('/sw.js'); | |
| wb.addEventListener('waiting', () => { | |
| console.log('A new service worker has installed'); | |
| wb.addEventListener('controlling', () => { | |
| // (3) as soon as the new service worker has taken control, | |
| // ask service worker to tell all open tabs to reload. | |
| wb.messageSW({type: 'RELOAD'}); | |
| }); | |
| // (1) Send a message telling the service worker to skip waiting. | |
| // This will trigger the `controlling` event handler above. | |
| // Note: for this to work, you have to add a message | |
| // listener in your service worker. | |
| wb.messageSW({type: 'SKIP_WAITING'}); | |
| }); | |
| navigator.serviceWorker.addEventListener('message', event => { | |
| // (5) service workers says we should reload | |
| if (event.data && event.data.type === 'RELOAD') { | |
| window.location.reload(); | |
| } | |
| }); | |
| wb.register(); | |
| } |
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| // this is the code of actual service worker. for all open tabs | |
| // there's at most one instance of this service worker running | |
| // ... | |
| addEventListener('message', (event) => { | |
| if (event.data) { | |
| switch (event.data.type) { | |
| case 'SKIP_WAITING': | |
| // (2) new service worker is installed and is asking to take control | |
| // (he is in hurry and can't wait) | |
| skipWaiting(); | |
| break; | |
| case 'RELOAD': | |
| // (4) someone just told us that new service worker is in control | |
| // lets tell all open tabs to reload | |
| clients.matchAll().then(clients => { | |
| clients.forEach(client => client.postMessage({type: 'RELOAD'})); | |
| }); | |
| break; | |
| } | |
| } | |
| }); | |
| // ... |
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