web/web_pwa_oca/templates/service_worker.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

    <template id="pwa_init" name="PWA Initialization">
        const oca_pwa = new PWA(<t t-esc="str(pwa_params)"/>);
    </template>
    <template id="pwa_core_events" name="PWA Core Events">
        <t t-set="evt_install">
            evt.waitUntil(oca_pwa.installWorker());
            self.skipWaiting();
        </t>
        self.addEventListener('install', evt =&gt; {
            console.log('[ServiceWorker] Installing...');
            <t t-raw="evt_install" />
        });

        <!-- This is necessary to get PWA installable.
            Other modules can add logic using 'evt_fetch' -->
        <t t-set="evt_fetch" />
        self.addEventListener('fetch', evt =&gt; {
            <t t-raw="evt_fetch" />
        });

        <t t-set="evt_activate">
            console.log('[ServiceWorker] Activating...');
            evt.waitUntil(oca_pwa.activateWorker());
            self.clients.claim();
        </t>
        self.addEventListener('activate', evt =&gt; {
            <t t-raw="evt_activate" />
        });
    </template>
    <template id="service_worker" name="PWA Service Worker">
        self.importScripts(...<t t-esc="str(pwa_scripts)" />);
        <t t-call="web_pwa_oca.pwa_init" />
        <t t-call="web_pwa_oca.pwa_core_events" />
    </template>

</odoo>